docs: fix some broken references

There are a number of documentation files that got moved or
renamed. update their references.

Signed-off-by: Mauro Carvalho Chehab <[e-mail]>
Acked-by: Shannon Nelson <[e-mail]>
Acked-by: Guenter Roeck <[e-mail]>
Acked-by: Rob Herring <[e-mail]>
Acked-by: Paul Walmsley <[e-mail]> # RISC-V
Acked-by: Bartosz Golaszewski <[e-mail]>
Signed-off-by: Jonathan Corbet <[e-mail]>

Documentation/devicetree/bindings/cpu/cpu-topology.txt

···
 [2] Devicetree NUMA binding description
     Documentation/devicetree/bindings/numa.txt
 [3] RISC-V Linux kernel documentation
-    Documentation/devicetree/bindings/riscv/cpus.txt
+    Documentation/devicetree/bindings/riscv/cpus.yaml
 [4] https://www.devicetree.org/specifications/

Documentation/devicetree/bindings/timer/ingenic,tcu.txt

···
 ==========================================================
 
 For a description of the TCU hardware and drivers, have a look at
-Documentation/mips/ingenic-tcu.txt.
+Documentation/mips/ingenic-tcu.rst.
 
 Required properties:
 

Documentation/driver-api/gpio/driver.rst

···
   gpiochip. It will pass the struct gpio_chip* for the chip to all IRQ
   callbacks, so the callbacks need to embed the gpio_chip in its state
   container and obtain a pointer to the container using container_of().
-  (See Documentation/driver-model/design-patterns.txt)
+  (See Documentation/driver-api/driver-model/design-patterns.rst)
 
 - gpiochip_irqchip_add_nested(): adds a nested cascaded irqchip to a gpiochip,
   as discussed above regarding different types of cascaded irqchips. The

Documentation/hwmon/inspur-ipsps1.rst

···
 -----------
 
 This driver does not auto-detect devices. You will have to instantiate the
-devices explicitly. Please see Documentation/i2c/instantiating-devices for
+devices explicitly. Please see Documentation/i2c/instantiating-devices.rst for
 details.
 
 Sysfs entries

Documentation/mips/ingenic-tcu.rst

···
 drivers access their registers through the same regmap.
 
 For more information regarding the devicetree bindings of the TCU drivers,
-have a look at Documentation/devicetree/bindings/mfd/ingenic,tcu.txt.
+have a look at Documentation/devicetree/bindings/timer/ingenic,tcu.txt.

Documentation/networking/device_drivers/mellanox/mlx5.rst

···
 ================
 
 mlx5 driver provides internal trace points for tracking and debugging using
-kernel tracepoints interfaces (refer to Documentation/trace/ftrase.rst).
+kernel tracepoints interfaces (refer to Documentation/trace/ftrace.rst).
 
 For the list of support mlx5 events check /sys/kernel/debug/tracing/events/mlx5/
 

MAINTAINERS

···
 R:	Pengutronix Kernel Team <[e-mail]>
 L:	[e-mail]
 S:	Maintained
-F:	Documentation/networking/j1939.txt
+F:	Documentation/networking/j1939.rst
 F:	net/can/j1939/
 F:	include/uapi/linux/can/j1939.h
 

drivers/net/ethernet/faraday/ftgmac100.c

···
 		}
 
 		/* Indicate that we support PAUSE frames (see comment in
-		 * Documentation/networking/phy.txt)
+		 * Documentation/networking/phy.rst)
 		 */
 		phy_support_asym_pause(phy);
 

drivers/net/ethernet/pensando/ionic/ionic_if.h

···
  *                      the @encap is set, the device will
  *                      offload the outer header checksums using
  *                      LCO (local checksum offload) (see
- *                      Documentation/networking/checksum-
- *                      offloads.txt for more info).
+ *                      Documentation/networking/checksum-offloads.rst
+ *                      for more info).
  *
  *                   IONIC_TXQ_DESC_OPCODE_CSUM_HW:
  *

fs/cifs/cifsfs.c

···
 	/*
 	 * Consider in future setting limit!=0 maybe to min(num_of_cores - 1, 3)
 	 * so that we don't launch too many worker threads but
-	 * Documentation/workqueue.txt recommends setting it to 0
+	 * Documentation/core-api/workqueue.rst recommends setting it to 0
 	 */
 
 	/* WQ_UNBOUND allows decrypt tasks to run on any CPU */