ANDROID: GKI: remove DRM_KMS_CMA_HELPER from GKI configuration

DRM_KMS_CMA_HELPER config option select FB_DEFERRED_IO config which
in turn causes ABI differences inside struct fb_info. Remove this config
option since it's not required in 4.19 GKI.

Bug: 152530986
Test: build
Signed-off-by: Suren Baghdasaryan <surenb@google.com>
Change-Id: I0a569544aecff61805e7398fa81b1409fc50496b
Merged-In: I0a569544aecff61805e7398fa81b1409fc50496b