USB: Add initial S5P EHCI driver

This patch adds host USB high speed driver for samsung S5P series. This
is initial driver and we need additional implementation to support some
functions like power management.

Signed-off-by: Jingoo Han <jg1.han@samsung.com>
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index d299906..cf7614d 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -65,6 +65,7 @@
 	default y if ARCH_CNS3XXX
 	default y if ARCH_VT8500
 	default y if PLAT_SPEAR
+	default y if PLAT_S5P
 	default y if ARCH_MSM
 	default PCI