Revert "drm/msm/disp/dpu: Remove dpu_kms_utils"

This reverts commit d9c7440d.

This reversion is happening as a result of disabling the
disp/dpu directory as it will not be used in 4.19 downstream
display driver and these changes are made in the common layer
which affects the downstream driver functionalities. Separate
patches are submitted to revert the upstream driver and
introduce the downstream version of the display driver.

Change-Id: I1c2ffc94f12df34b83f2900c89b59ad4a7694517
Signed-off-by: Samantha Tran <samtran@codeaurora.org>