dt/bindings: Correct clk binding example for PIC32 WDT.

dt/bindings: Correct clk binding example for PIC32 WDT.

Update binding example based on new clock binding scheme.
[1] Documentation/devicetree/bindings/clock/microchip,pic32.txt

Signed-off-by: Purna Chandra Mandal <[email protected]>
Acked-by: Rob Herring <[email protected]>
Cc: Kumar Gala <[email protected]>
Cc: Ian Campbell <[email protected]>
Cc: Joshua Henderson <[email protected]>
Cc: Mark Rutland <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: [email protected]
Patchwork: https://patchwork.linux-mips.org/patch/13269/
Signed-off-by: Ralf Baechle <[email protected]>