drm/msm/adreno: Add missing MODULE_FIRMWARE macros

The driver references some firmware files that don't have corresponding
MODULE_FIRMWARE macros and thus won't be listed via modinfo. Fix that.

Signed-off-by: Juerg Haefliger <juerg.haefliger@canonical.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Joel Fernandes (Google) <joel@joelfernandes.org>
Patchwork: https://patchwork.freedesktop.org/patch/543290/


[rob: drop a690_gmu.bin as a690 is using same fw as a660 now]
Signed-off-by: Rob Clark <robdclark@chromium.org>