msm: ipa: add support for HSIC as an IPA client

Add support for HSIC client. In order to enable the device to work in HSIC
in device mode this change in IPA driver is required.

Change-Id: I1b289b92de7df01223ded49628e3a46bc256e991
Signed-off-by: Gidon Studinski <gidons@codeaurora.org>
Signed-off-by: Ravit Katzav <rkatzav@codeaurora.org>