drm/amdgpu: fix warning about missing imu prototype

for imu_v11_0_3_program_rlc_ram(). Include imu_v11_0_3.h
in imu_v11_0_3.c.

Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/amdgpu: enable imu_rlc_ram programming for v11_0_3

All gc v11_0_3 registers in gcvml2 range have different
register offset from the ones in gc v11_0_0. v11_0_3
imu_rlc_ram programming has to be separated from v11_0_0
implementation

v2: fix checkpatch errors (Alex)

Signed-off-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Yang Wang <KevinYang.Wang@amd.com>
Reviewed-by: Frank Min <Frank.Min@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>