msm: mpq8064: Correct VCAP stride calucation

VCAP was not properly calucating the stride values. This patch
allows for line stride to be 16 byte aligned.

CRs-Fixed: 390191
Change-Id: Id9eca2fd3ec4a51347f2656271591f7bccf36ad5
Signed-off-by: Terence Hampson <thampson@codeaurora.org>