Bluetooth: btrsi: rework dependencies

The linkage between the bluetooth driver and the wireless
driver is not defined properly, leading to build problems
such as:

warning: (BT_HCIRSI) selects RSI_COEX which has unmet direct dependencies (NETDEVICES && WLAN && WLAN_VENDOR_RSI && BT_HCIRSI && RSI_91X)
drivers/net/wireless/rsi/rsi_91x_main.o: In function `rsi_read_pkt':
(.text+0x205): undefined reference to `rsi_bt_ops'

As the dependency is actually the reverse (RSI_91X uses
the BT_RSI driver, not the other way round), this changes
the dependency to match, and enables the bluetooth driver
from the RSI_COEX symbol.

Fixes: 38aa4da5 ("Bluetooth: btrsi: add new rsi bluetooth driver")
Acked-by; Marcel Holtmann <marcel@holtmann.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Kalle Valo <kvalo@codeaurora.org>

drivers/bluetooth/Kconfig

@@ -393,9 +393,7 @@ config BT_QCOMSMD
 	  kernel or say M to compile as a module.
 
 config BT_HCIRSI
-	tristate "Redpine HCI support"
-	default n
-	select RSI_COEX
+	tristate
 	help
 	  Redpine BT driver.
 	  This driver handles BT traffic from upper layers and pass

drivers/net/wireless/rsi/Kconfig

@@ -13,6 +13,7 @@ if WLAN_VENDOR_RSI
 
 config RSI_91X
 	tristate "Redpine Signals Inc 91x WLAN driver support"
+	select BT_HCIRSI if RSI_COEX
 	depends on MAC80211
 	---help---
 	  This option enabes support for RSI 1x1 devices.
@@ -44,7 +45,8 @@ config RSI_USB
 
 config RSI_COEX
 	bool "Redpine Signals WLAN BT Coexistence support"
-	depends on BT_HCIRSI && RSI_91X
+	depends on BT && RSI_91X
+	depends on !(BT=m && RSI_91X=y)
 	default y
 	---help---
 	  This option enables the WLAN BT coex support in rsi drivers.