drivers: nrf_wifi: Add help for SR RF switch

Helps in understanding this switch usage better.

(cherry picked from commit 624543e)

Original-Signed-off-by: Chaitanya Tata <[email protected]>
GitOrigin-RevId: 624543e
Cr-Build-Id: 8727764308049365969
Cr-Build-Url: https://cr-buildbucket.appspot.com/build/8727764308049365969
Copybot-Job-Name: zephyr-main-copybot-downstream
Change-Id: Ic3c43bc77612330c7ebc831c0226889d0ee578d9
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/zephyr/+/6116708
Commit-Queue: Fabio Baltieri <[email protected]>
Tested-by: ChromeOS Prod (Robot) <[email protected]>
Reviewed-by: Fabio Baltieri <[email protected]>

Author: Chaitanya Tata

drivers/wifi/nrf_wifi/Kconfig.nrfwifi

@@ -196,6 +196,10 @@ 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"