msm: ipa3: Fix uninitialized variables access

Kernel compilation warning is generated due to
these uninitialized variables access. This change
fixes them by initializing the variables.

Change-Id: Ifae04fe5e4d1b9a0c2c399a3c6746c38dea5c4cc
CRs-fixed: 2004062
Signed-off-by: Ghanim Fodi <gfodi@codeaurora.org>