[PATCH -next] ARC: Fix earlycon build breakage

[Peter Hurley <peter@hurleysoftware.com>]

Commit ffb7fcd66f14 ("ARC: Dynamically determine BASE_BAUD from DeviceTree")
breaks arc:defconfig build:

       drivers/built-in.o: In function `of_setup_earlycon':
       (.init.text+0xb3e): undefined reference to `arc_early_base_baud'
       drivers/built-in.o: In function `setup_earlycon':
       (.init.text+0xcd0): undefined reference to `arc_early_base_baud'
       make: *** [vmlinux] Error 1

BASE_BAUD is only required for earlycon, which should depend on
CONFIG_SERIAL_EARLYCON.

Reported-by: Guenter Roeck <linux@roeck-us.net>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Peter Hurley <peter@hurleysoftware.com>
---
 arch/arc/kernel/devtree.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arc/kernel/devtree.c b/arch/arc/kernel/devtree.c
index 5036d4c..e32b54a 100644
--- a/arch/arc/kernel/devtree.c
+++ b/arch/arc/kernel/devtree.c
@@ -17,7 +17,7 @@
 #include <asm/clk.h>
 #include <asm/mach_desc.h>
 
-#ifdef CONFIG_SERIAL_8250_CONSOLE
+#ifdef CONFIG_SERIAL_EARLYCON
 
 static unsigned int __initdata arc_base_baud;
 
-- 
2.2.2