msm: ipa3: Fix to avoid structural padding

Observing memory out-of-bounds issue while decoding
the QMI_MAX_LEN value. IDL generator not considering
structural padding into effect. Add changes to overcome
the memory alignment issue.

Change-Id: I7e44e6bedfe5736a156c3280e7c9b6cba7ccfe25
Signed-off-by: Praveen Kurapati <pkurapat@codeaurora.org>