msm: ipa: ipa_tx_dp issued after suspend

Suspend request issued by GSB interface
to ipa-sw. While suspend is in progress, data
transmit also initiated before ipa completes
its suspend sequence. Due to which, we see
un-clocked access on NOC, since IPA-sw submits desc to
IPA-hw after clock is GATED.
So, prevent data transfer if the iface's suspend
in progress or completed.

Change-Id: I9d2c1d0803352dcc1907777d03403722afb879db
Signed-off-by: Mohammed Javid <mjavid@codeaurora.org>