qcacmn: fix runtime PM get/put out of sync

Currently, in get_htc_send_packets() when the
hif_system_pm_state_check() fails, we are not doing a
runtime PM put operation for the corresponding get operation.
This imbalance will never make the system enter runtime suspend
state and also we do a BUG() when such imbalance is encountered
during runtime PM deinit. This change also fixes a potential
memory leak.

Change-Id: I3e5916005d583de42a49dd2dc0632bfcca1251e4
CRs-Fixed: 2947247