Revert "defconfig: msm: enable memory cgroups"

This reverts 'commit 7b8378ac
("defconfig: msm: enable memory cgroups")'

Observing janks sometimes when cgroup switch is happening,
disabling memory cgroups is a quick workaround.

Change-Id: I4a705525dda2a0b8dc1052eb6dc2e116cb817d87
Signed-off-by: Kishore Srivenkata Ganesh Bolisetty <bsrivenk@codeaurora.org>