defconfig: add config option for lazy mapping support on msm8953

Add config option for lazy mapping support that works on reference
counting of mappings when try to map same region twice and there by
achieve improved performance.

Change-Id: I60b59ed509ea7b63484a323b26570f0300fee8ef
Signed-off-by: Charan Teja Reddy <charante@codeaurora.org>