ath10k: configure the vdev listen interval before wow suspend

During the WLAN WOWLAN mode the default listen interval needs
to be configured for each vdev to receive and process the WLAN
WOW pattern match found by the WLAN firmware.

Improper listen interval configuration for the vdev leads to WOW
pattern match missing by the WLAN module and a result WLAN module
failed to wakeup the target as per the WOW pattern configured
during WOWLAN suspend method.

CRs-Fixed: 2141933
Change-Id: I4b4e03c134ecea328bbda55748b1dd633697167a
Signed-off-by: Sarada Prasanna Garnayak <sgarna@codeaurora.org>