msm: ipa3: fix memory leak in ipa3_send()

In ipa3_send() there is a dynamic allocation of gsi_xfer_elem_array,
which was not freed in case of success.
The fix is to release gsi_xfer_elem_array after gsi_queue_xfer() returns
with success.

Change-Id: Ic4394a87c8b99f36810ac3e1cde422b29028a1fa
Signed-off-by: Sivan Reinstein <sivanr@codeaurora.org>