msm: lmh_lite: Remove the cache invalidation call

Cache invalidation call is redundant, since we flush
the buffer before we initiate the access. The cache
flush internally cleans and invalidates the cache.
So remove the redundant cache invalidation call from
the code.

Change-Id: I94ff7c447929a8bf5f246a7fa06375cd684c2427
Signed-off-by: Ram Chandrasekar <rkumbako@codeaurora.org>