Revert "Don't force GPU composite for older devices"

This reverts commit a8e98319cfa2db4db609a5997f6d1b0bd8a42671.
Revert "display: Fix support for MDP 4.1"

This reverts commit 1485480ac71910b1e40a0c18c25c24c42e447bb7.
Revert "display: Add support for MDP 4.1"

This reverts commit 2fbc10e361ca151f947469d26a2ebd2fb964ff18.

Conflicts:
	libhwcomposer/hwc.cpp

Change-Id: Iabcc2f9575c5add93aa336f5f5fb75a23d773a67