dt-bindings: timer: renesas,rz-mtu3: Improve documentation

Fix the documentation issues pointed by Pavel while backporting
it to 6.1.y-cip.
- Replace '32- bit'->'32-bit'
- Consistently remove '.' at the end of line for the specifications
- Replace ' (excluding MTU8)'-> '(excluding MTU8)'

Reported-by: Pavel Machek <[e-mail]>
Closes: https://lore.kernel.org/all/[e-mail]
Signed-off-by: Biju Das <[e-mail]>
Acked-by: Conor Dooley <[e-mail]>
Signed-off-by: Daniel Lezcano <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]

Documentation/devicetree/bindings/timer/renesas,rz-mtu3.yaml

···
 
 description: |
   This hardware block consists of eight 16-bit timer channels and one
-  32- bit timer channel. It supports the following specifications:
-    - Pulse input/output: 28 lines max.
+  32-bit timer channel. It supports the following specifications:
+    - Pulse input/output: 28 lines max
     - Pulse input 3 lines
     - Count clock 11 clocks for each channel (14 clocks for MTU0, 12 clocks
       for MTU2, and 10 clocks for MTU5, four clocks for MTU1-MTU2 combination
···
         - Input capture function (noise filter setting available)
         - Counter-clearing operation
         - Simultaneous writing to multiple timer counters (TCNT)
-          (excluding MTU8).
+          (excluding MTU8)
         - Simultaneous clearing on compare match or input capture
-          (excluding MTU8).
+          (excluding MTU8)
         - Simultaneous input and output to registers in synchronization with
-          counter operations           (excluding MTU8).
+          counter operations (excluding MTU8)
         - Up to 12-phase PWM output in combination with synchronous operation
           (excluding MTU8)
     - [MTU0 MTU3, MTU4, MTU6, MTU7, and MTU8]
···
     - [MTU3, MTU4, MTU6, and MTU7]
         - Through interlocked operation of MTU3/4 and MTU6/7, the positive and
           negative signals in six phases (12 phases in total) can be output in
-          complementary PWM and reset-synchronized PWM operation.
+          complementary PWM and reset-synchronized PWM operation
         - In complementary PWM mode, values can be transferred from buffer
           registers to temporary registers at crests and troughs of the timer-
           counter values or when the buffer registers (TGRD registers in MTU4
-          and MTU7) are written to.
-        - Double-buffering selectable in complementary PWM mode.
+          and MTU7) are written to
+        - Double-buffering selectable in complementary PWM mode
     - [MTU3 and MTU4]
         - Through interlocking with MTU0, a mode for driving AC synchronous
           motors (brushless DC motors) by using complementary PWM output and
           reset-synchronized PWM output is settable and allows the selection
-          of two types of waveform output (chopping or level).
+          of two types of waveform output (chopping or level)
     - [MTU5]
-        - Capable of operation as a dead-time compensation counter.
+        - Capable of operation as a dead-time compensation counter
     - [MTU0/MTU5, MTU1, MTU2, and MTU8]
         - 32-bit phase counting mode specifiable by combining MTU1 and MTU2 and
-          through interlocked operation with MTU0/MTU5 and MTU8.
+          through interlocked operation with MTU0/MTU5 and MTU8
     - Interrupt-skipping function
         - In complementary PWM mode, interrupts on crests and troughs of counter
           values and triggers to start conversion by the A/D converter can be
-          skipped.
+          skipped
     - Interrupt sources: 43 sources.
     - Buffer operation:
         - Automatic transfer of register data (transfer from the buffer
···
         - A/D converter start triggers can be generated
         - A/D converter start request delaying function enables A/D converter
           to be started with any desired timing and to be synchronized with
-          PWM output.
+          PWM output
     - Low power consumption function
-        - The MTU3a can be placed in the module-stop state.
+        - The MTU3a can be placed in the module-stop state
 
     There are two phase counting modes. 16-bit phase counting mode in which
     MTU1 and MTU2 operate independently, and cascade connection 32-bit phase