include: dt-binding: clock: Rename zynqmp header file

Rename file name of ZynqMP clk dt-bindings to align with
file name of reset and power dt-bindings.

Signed-off-by: Rajan Vaja <rajan.vaja@xilinx.com>
Signed-off-by: Jolly Shah <jolly.shah@xilinx.com>
Signed-off-by: Michal Simek <michal.simek@xilinx.com>