drm/msm/dp: call drm_dp_cec_irq handler appropriately

DP CEC_IRQ handler is independent of DP Link's power
status. Call drm_dp_cec_irq handler if hpd_irq is set.

Change-Id: I58d989e469ae1939b3375eb14ef984a064cb6b7a
Signed-off-by: Narender Ankam <nankam@codeaurora.org>
2 files changed