msm:cpp: Add support for firmware versions 1.2.x for msm8x26

CPP core in msm8x26 is version 2.0.0. This must be taken in
account when migrating from firmware version 1.1.6 to version
1.2.A.

Change-Id: Idf8967d0d2f130dd6cf32efa0442797fae9e53a8
Signed-off-by: Iliya Varadzhakov <ivarad@codeaurora.org>