ARM: s5pv210: fix pm.c kernel-doc warning

ARM: s5pv210: fix pm.c kernel-doc warning

Use the correct function name in the kernel-doc comment to prevent
a kernel-doc warning:

arch/arm/mach-s5pv210/pm.c:61: warning: expecting prototype for s3c_pm_do_restore(). Prototype was for s3c_pm_do_restore_core() instead

Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: <patches@armlinux.org.uk>
Link: https://lore.kernel.org/r/20240114052751.17242-1-rdunlap@infradead.org
Fixes: 423c62bfb623 ("ARM: s5pv210: use private pm save/restore")
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>