msm: cpp: Fix for integer overflow in cpp

Due to integer overflow ,the bound check in config frame function
may pass and this may allow user to access invalid buffer. This
fix takes care of proper bound and don't allow integer overflow.

CRs-Fxied: 1097709
Change-Id: I504ad591633afaba82268b5ee27a321691d75c80
Signed-off-by: Kumar Behera <mohanb@codeaurora.org>