USB: Check for ARCH_EXYNOS separately

ARCH_EXYNOS is going to be excluded from PLAT_S5P, so it must be checked
separately in Exynos-related Kconfig entries.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 344d5e2..922a65d 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -225,7 +225,7 @@
 
 config USB_EHCI_S5P
        tristate "EHCI support for Samsung S5P/EXYNOS SoC Series"
-       depends on PLAT_S5P
+       depends on PLAT_S5P || ARCH_EXYNOS
        help
 	Enable support for the Samsung S5Pxxxx and Exynos3/4/5 SOC's
 	on-chip EHCI controller.