x86: Set default baud rate on Geode images to 115200

Prior to commit 1496b95a ("x86: clean up default grub baudrate
settings") we had three different baud rates for the Geode targets:
19200 for net5501, 38400 for alix2, and 115200 for Geos.

It doesn't seem that there's a very good reason for varying from our
default 115200 baud, so let's make the Geode target do that instead.

Signed-off-by: David Woodhouse <dwmw2@infradead.org>

config/Config-images.in

@@ -201,7 +201,6 @@ menu "Target Images"
 		int "Serial port baud rate"
 		depends on GRUB_IMAGES
 		default 38400 if TARGET_x86_generic
-		default 38400 if TARGET_x86_geode
 		default 115200
 
 	config GRUB_BOOTOPTS