Revert "drm/msm/disp/dpu: fix two spelling mistakes"

This reverts commit 3e91a8b5.

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: Ic7bae48c61a87d76a5e311d802e366cf7af52ff8
Signed-off-by: Samantha Tran <samtran@codeaurora.org>