serial: uart_bt: select SERIAL_SUPPORT_INTERRUPT

Select SERIAL_SUPPORT_INTERRUPT for uart_bt, this is required to have
the interrupt API available.

Signed-off-by: Fabio Baltieri <[email protected]>

Author: fabiobaltieri

drivers/serial/Kconfig.bt

@@ -8,6 +8,7 @@ config UART_BT
 	select UART_INTERRUPT_DRIVEN
 	select RING_BUFFER
 	select EXPERIMENTAL
+	select SERIAL_SUPPORT_INTERRUPT
 	help
 	  Enable the UART over NUS Bluetooth driver, which can be used to pipe
 	  serial data over Bluetooth LE GATT using NUS (Nordic UART Service).