drm/amdgpu: MODULE_FIRMWARE requires linux/module.h

Fixes: 6a7a0bdb ("drm/amdgpu: add psp_v12_0 for renoir (v2)")
Reviewed-by: Huang Rui <ray.huang@amd.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>