staging: vc04_services: fix gcc-13 build warning

stable inclusion
from stable-v5.10.184
commit b6f309e9d24e9b14ffa8d35422b55fec3b9e713e
category: bugfix
bugzilla: https://gitee.com/openeuler/kernel/issues/I8IRR2

Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=b6f309e9d24e9b14ffa8d35422b55fec3b9e713e



--------------------------------

Not upstream as newer kernels fixed this properly.

Fix up a mismatched function prototype warning in the vc04_services
driver that gcc-13 shows.

Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: sanglipeng <sanglipeng1@jd.com>