[nrf fromlist] drivers: nrf_wifi: Add help for SR RF switch

Helps in understanding this switch usage better.

Upstream PR #: 83173

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

Author: krish2718

drivers/wifi/nrf_wifi/Kconfig.nrfwifi

@@ -201,6 +201,10 @@ config NRF70_SR_COEX
 
 config NRF70_SR_COEX_RF_SWITCH
 	bool "GPIO configuration to control SR side RF switch position"
+	help
+	  Select this option to enable GPIO configuration to control SR side RF switch position.
+	  If this GPIO is asserted (1), the SR side RF switch is connected to the Wi-Fi side (shared antenna).
+	  If this GPIO is de-asserted (0), the SR side RF switch is connected to the SR side (separate antenna).
 
 config NRF70_WORKQ_STACK_SIZE
 	int "Stack size for workqueue"