Convert CONFIG_USB_XHCI_EXYNOS et al to Kconfig

This converts the following to Kconfig:
   CONFIG_USB_XHCI_EXYNOS
   CONFIG_USB_EHCI_EXYNOS

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/drivers/usb/host/Kconfig b/drivers/usb/host/Kconfig
index 7d5bde5..0b82c2f 100644
--- a/drivers/usb/host/Kconfig
+++ b/drivers/usb/host/Kconfig
@@ -32,6 +32,14 @@
 	  Support USB2/3 functionality in simple SoC integrations with
 	  USB controller based on the DesignWare USB3 IP Core.
 
+config USB_XHCI_EXYNOS
+	bool "Support for Samsung Exynos5 family on-chip xHCI USB controller"
+	depends on ARCH_EXYNOS5
+	default y
+	help
+	  Enables support for he on-chip xHCI controller on Samsung Exynos5
+	  SoCs.
+
 config USB_XHCI_MTK
 	bool "Support for MediaTek on-chip xHCI USB controller"
 	depends on ARCH_MEDIATEK
@@ -157,6 +165,14 @@
 	---help---
 	  Enables support for the on-chip EHCI controller on Atmel chips.
 
+config USB_EHCI_EXYNOS
+	bool "Support for Samsung Exynos EHCI USB controller"
+	depends on ARCH_EXYNOS
+	default y
+	---help---
+	  Enables support for the on-chip EHCI controller on Samsung Exynos
+	  SoCs.
+
 config USB_EHCI_MARVELL
 	bool "Support for Marvell on-chip EHCI USB controller"
 	depends on ARCH_MVEBU || ARCH_KIRKWOOD || ARCH_ORION5X