ARM: zynq: Remove clk/zynq.h header

slcr.c is not having any reference to clock that's why remove it.

Link: https://lore.kernel.org/r/d7b129c8e3f867c2fda5fb0adbb1983103c5be5e.1704885029.git.michal.simek@amd.com


Signed-off-by: Michal Simek <michal.simek@amd.com>