msm: ipa3: Embellish IPA/GSI support for IPA 4.5 emulation system

Changes made to the IPA/GSI drivers to further support the IPA 4.5
emulation system. The emulation system is an FPGA based system that
allows for the prototyping of new IPA features before committing them
to silicon.

Change-Id: I2cb4d011b52648a9c21c9c0ec7b74bc94d3c2623
CRs-Fixed: 2280267
Acked-by: Perry Randise <prandise@qti.qualcomm.com>
Signed-off-by: Jennifer L. Zenner <jzenner@codeaurora.org>