Wi-Fi: Enable Auto BMPS feature

Initial Powersave state in driver is out of sync with
cfg80211/framework powersave state because of which driver
doesn't go to powersave mode in case of static IP configuration.

This change triggers a timer (gAutoBmpsTimerValue=90) after the
association and put the chip into powersave mode after timeout.

Bug: 38254069
Test: Regression Test.
Change-Id: I960a346ebcbd31b7c33d33bc11416e9f7325d6f2
diff --git a/WCNSS_qcom_cfg.ini b/WCNSS_qcom_cfg.ini
index aa24f96..c433548 100644
--- a/WCNSS_qcom_cfg.ini
+++ b/WCNSS_qcom_cfg.ini
@@ -700,6 +700,10 @@
 #Timer waiting for interface up from the upper layer
 gInterfaceChangeWait=1000
 
+#Enable Bmps(power save in connected state) based on timer
+#Timer value is in seconds
+gAutoBmpsTimerValue=90
+
 END
 
 # Note: Configuration parser would not read anything past the END marker