drivers: wifi: siwx91x: Introduce flag for LIMIT_PACKET_BUF_PER_STA

Introduced WIFI_SILABS_SIWX91X_LIMIT_PACKET_BUF_PER_STA.
This flag limits packet queues in AP mode.

Signed-off-by: Muzaffar Ahmed <muzaffar.ahmed@silabs.com>

Author: muahmed-silabs

drivers/wifi/siwx91x/Kconfig.siwx91x

@@ -45,6 +45,14 @@ config NET_MGMT_EVENT_STACK_SIZE
 config NET_MGMT_EVENT_QUEUE_SIZE
 	default 10
 
+config WIFI_SILABS_SIWX91X_LIMIT_PACKET_BUF_PER_STA
+	bool "Limits the number of packets buffered per STA in AP mode"
+	default y
+	help
+	  In AP mode, if the bit is set, only two packets per Station (STA)
+	  would be buffered when the STA is in Power Save (PS) mode.
+	  This helps manage buffer usage and ensures efficient packet handling.
+
 config WIFI_SILABS_SIWX91X_ENABLE_ROAMING
 	bool "WiFi roaming support"
 	help

soc/silabs/silabs_siwx91x/siwg917/nwp.c

@@ -109,6 +109,11 @@ int siwg91x_get_nwp_config(int wifi_oper_mode, sl_wifi_device_configuration_t *g
 		if (IS_ENABLED(CONFIG_BT_SILABS_SIWX91X)) {
 			LOG_WRN("Bluetooth is not supported in AP mode");
 		}
+
+		if (IS_ENABLED(CONFIG_WIFI_SILABS_SIWX91X_LIMIT_PACKET_BUF_PER_STA)) {
+			boot_config->custom_feature_bit_map |= SL_SI91X_CUSTOM_FEAT_LIMIT_PACKETS_PER_STA;
+		}
+
 	} else {
 		return -EINVAL;
 	}