wifi: nrf_wifi: Reduce default DATA_HEAP size

Most samples may not need 130000 bytes for data plane operations.
With STA sample, 40000 bytes have been established as enough for
basic traffic. Reduce RX ring buffer size accordingly to 16.

Signed-off-by: Ravi Dondaputi <[email protected]>

Author: rado17

drivers/wifi/nrf_wifi/Kconfig.nrfwifi

@@ -396,7 +396,7 @@ config NRF70_BAND_UNII_4_UPPER_EDGE_BACKOFF_HE
 
 config NRF70_RX_NUM_BUFS
 	int "Number of RX buffers"
-	default 48
+	default 16
 
 config NRF70_MAX_TX_AGGREGATION
 	int "Maximum number of TX packets to aggregate"
@@ -536,7 +536,8 @@ config NRF_WIFI_DATA_HEAP_SIZE
 	int "Dedicated memory pool for data plane"
 	default 8000 if NRF70_SCAN_ONLY || NRF70_RADIO_TEST #TODO: Need to optimize this.
 	default 110000 if !SOC_FAMILY_NORDIC_NRF
-	default 130000
+	default 30000 if NRF_WIFI_ZERO_COPY_TX
+	default 40000
 
 if NETWORKING
 # Finetune defaults for certain system components used by the driver