blackfin: BF538/9 serial uart support

Enable third UART on BF538/9

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <cooloney@kernel.org>
Signed-off-by: Alan Cox <alan@lxorguk.ukuu.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/drivers/serial/Kconfig b/drivers/serial/Kconfig
index aa9d3a4..07c03b9 100644
--- a/drivers/serial/Kconfig
+++ b/drivers/serial/Kconfig
@@ -770,7 +770,7 @@
 
 config SERIAL_BFIN_UART2
 	bool "Enable UART2"
-	depends on SERIAL_BFIN && (BF54x)
+	depends on SERIAL_BFIN && (BF54x || BF538 || BF539)
 	help
 	  Enable UART2