[Blackfin] arch: The BF527 EZkit connects UART1/PORTF

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Bryan Wu <bryan.wu@analog.com>

arch/blackfin/mach-bf527/Kconfig

@@ -43,7 +43,7 @@ endchoice
 
 choice
 	prompt "UART1"
-	default BF527_UART1_PORTG
+	default BF527_UART1_PORTF
 	help
 	  Select PORT used for UART1. See Hardware Reference Manual