drm/amd/display: Modify mismatched function name

No functional modification involved.

drivers/gpu/drm/amd/amdgpu/../display/dc/dc_dmub_srv.c:615: warning: expecting prototype for setup_subvp_dmub_command(). Prototype was for populate_subvp_cmd_pipe_info() instead.

Link: https://bugzilla.openanolis.cn/show_bug.cgi?id=2587


Reported-by: Abaci Robot <abaci@linux.alibaba.com>
Signed-off-by: Jiapeng Chong <jiapeng.chong@linux.alibaba.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>