drm/msm/gpu: Fix crash on devices without devfreq support (v2)

[Rob Clark]

Avoid going down devfreq paths on devices where devfreq is not
initialized.

v2: Change has_devfreq() logic [Dmitry]

Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>
Reported-by: Anders Roxell <anders.roxell@xxxxxxxxxx>
Signed-off-by: Rob Clark <robdclark@xxxxxxxxxxxx>
Fixes: 6aa89ae1fb04 ("drm/msm/gpu: Cancel idle/boost work on suspend")
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20220308184844.1121029-1-robdclark@xxxxxxxxx
---
 drivers/gpu/drm/msm/msm_gpu_devfreq.c | 30 +++++++++++++++++++++++++-----
 1 file changed, 25 insertions(+), 5 deletions(-)

Reported-by: Linux Kernel Functional Testing <lkft@xxxxxxxxxx>

--
Linaro LKFT
https://lkft.linaro.org

[1] https://qa-reports.linaro.org/lkft/linux-stable-rc-linux-5.17.y/build/v5.17-40-gfa2df4c49e4d/testrun/8704058/suite/linux-log-parser/test/check-kernel-oops-4788790/log