drm/msm/dpu: handle failures while initializing displays

drm/msm/dpu: handle failures while initializing displays

[ Upstream commit a802ee99c448ca0496fa307f3e46b834ae2a46a3 ]

Bail out KMS hw init on display initialization failures with
proper error logging.

changes in v3:
    - introduced in the series
changes in v4:
    - avoid duplicate return on errors (Sean Paul)
    - avoid spamming errors on failures (Jordon Crouse)

Signed-off-by: Jeykumar Sankaran <jsanka@codeaurora.org>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>