drm/msm/a6xx: add QMP dependency

drm/msm/a6xx: add QMP dependency

When QMP is in a loadable module, the A6xx GPU driver fails to link
as built-in:

x86_64-linux-ld: drivers/gpu/drm/msm/adreno/a6xx_gmu.o: in function `a6xx_gmu_resume':
a6xx_gmu.c:(.text+0xd62): undefined reference to `qmp_send'

Add the usual dependency that still allows compiling without QMP but
otherwise avoids the broken combination of options.

Fixes: 88a0997f2f949 ("drm/msm/a6xx: Send ACD state to QMP at GMU resume")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Reviewed-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/562945/
Link: https://lore.kernel.org/r/20231016200415.791090-1-arnd@kernel.org
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>