ARM: S3C2440: mini2440: Fix missing CONFIG_S3C_DEV_USB_HOST

Fix missing select of S3C_DEV_USB_HOST when building for mini2440
only. Fixes the following error:

built-in.o: undefined reference to `s3c_device_usb`
Signed-off-by: Ben Dooks <ben-linux@fluff.org>

arch/arm/mach-s3c2440/Kconfig

@@ -103,6 +103,7 @@ config MACH_MINI2440
 	select LEDS_TRIGGER_BACKLIGHT
 	select SND_S3C24XX_SOC_S3C24XX_UDA134X
 	select S3C_DEV_NAND
+	select S3C_DEV_USB_HOST
 	help
 	  Say Y here to select support for the MINI2440. Is a 10cm x 10cm board
 	  available via various sources. It can come with a 3.5" or 7" touch LCD.