drm/msm: fix fault injection support

Readd the header that was erroneously dropped during KMS code
refactoring.

Fixes: 506efcba ("drm/msm: carve out KMS code from msm_drv.c")
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202310100836.6E6zjEcE-lkp@intel.com/


Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/561739/


Signed-off-by: Rob Clark <robdclark@chromium.org>