msm: ipa: implement GSI reset channel sequence

Add a new API to reset GSI channel in IPA.
Due to a HW limitation a special handling is needed in case
there's an open aggregation frame when trying to reset the
channel.

Change-Id: If03b81b81b6b0839ac0b315df927e5679e27638c
Signed-off-by: Sivan Reinstein <sivanr@codeaurora.org>