ARM: zynq: slcr: fix function prototype kernel-doc warnings

ARM: zynq: slcr: fix function prototype kernel-doc warnings

Use the same name in the function prototype description and the function
to prevent kernel-doc warnings:

slcr.c:158: warning: expecting prototype for zynq_slcr_cpu_state(). Prototype was for zynq_slcr_cpu_state_read() instead
slcr.c:176: warning: expecting prototype for zynq_slcr_cpu_state(). Prototype was for zynq_slcr_cpu_state_write() instead

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Michal Simek <michal.simek@amd.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: linux-arm-kernel@lists.infradead.org
Cc: patches@armlinux.org.uk
Link: https://lore.kernel.org/r/20240114051730.16796-1-rdunlap@infradead.org
Signed-off-by: Michal Simek <michal.simek@amd.com>