dt-bindings: clock: st,stm32mp1-rcc: complete the reference path

All other paths referenced in the file follow a scheme starting from the
Linux root. The patch adjusts the single file that deviated from this
scheme, making it consistent with the others.

Signed-off-by: Dario Binacchi <[e-mail]>
Link: https://lore.kernel.org/r/[e-mail]
Acked-by: Krzysztof Kozlowski <[e-mail]>
Signed-off-by: Stephen Boyd <[e-mail]>

Documentation/devicetree/bindings/clock/st,stm32mp1-rcc.yaml

···
   =================
 
   All available clocks are defined as preprocessor macros in
-  dt-bindings/clock/stm32mp1-clks.h header and can be used in device
+  include/dt-bindings/clock/stm32mp1-clks.h header and can be used in device
   tree sources.
 
   Specifying softreset control of devices