qcacmn: Add RX frame pending check for WoW

Sometimes frames are queued to dp_rx_thread wait queue
during WoW suspend in progress. At this time dp_rx_thread
is in SUSPEND state and these frames can't deliver to Linux
Stack, for ICMP case, if no other frames come to wake up
system, ICMP timeout will happen. Add a RX suspend check
in WoW to avoid suspend when frame comes before WMI_WOW_ENABLE
sends to FW

Change-Id: I756d3127f75da8f0e6e303c1250c01ce0c6ac573
CRs-Fixed: 2756263

dp/inc/cdp_txrx_ops.h

@@ -1101,6 +1101,7 @@ struct ol_if_ops {
 				 uint8_t pdev_id);
 	QDF_STATUS(*nss_stats_clr)(struct cdp_ctrl_objmgr_psoc *psoc,
 				   uint8_t vdev_id);
+	int (*dp_rx_get_pending)(ol_txrx_soc_handle soc);
 	/* TODO: Add any other control path calls required to OL_IF/WMA layer */
 };