[nrf fromlist] net: l2: wifi: Fix the default keepalive value

30s is too aggressive for most APs, and hostapd also uses 5mins as the
default value.

Upstream PR #: 93920

Signed-off-by: Chaitanya Tata <[email protected]>

Author: krish2718

subsys/net/l2/wifi/Kconfig

@@ -158,7 +158,7 @@ endif # WIFI_NM_WPA_SUPPLICANT_CRYPTO_ENTERPRISE
 config WIFI_MGMT_BSS_MAX_IDLE_TIME
 	int "BSS max idle timeout in seconds"
 	range 0 64000
-	default 30
+	default 300
 	help
 	  As per 802.11-2020: 11.21.13 BSS max idle period management
 	  If dot11WirelessManagementImplemented is true, dot11BSSMaxIdlePeriod is