drm/msm/a6xx: Increase HFI response timeout

drm/msm/a6xx: Increase HFI response timeout

When ACD feature is enabled, it triggers some internal calibrations
which result in a pretty long delay during the first HFI perf vote.
So, increase the HFI response timeout to match the downstream driver.

Signed-off-by: Akhil P Oommen <quic_akhilpo@quicinc.com>
Tested-by: Maya Matuszczyk <maccraft123mc@gmail.com>
Tested-by: Anthony Ruhier <aruhier@mailbox.org>
Patchwork: https://patchwork.freedesktop.org/patch/649344/
Signed-off-by: Rob Clark <robdclark@chromium.org>