usb: Fix Kconfig unmet dependencies for Microblaze EHCI

Disable USB_ARCH_HAS_EHCI in arch Kconfig and enable it in usb Kconfig

Warning log:
warning: (MICROBLAZE) selects USB_ARCH_HAS_EHCI which has unmet
direct dependencies (USB_SUPPORT)

Signed-off-by: Michal Simek <monstr@monstr.eu>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index 41b6e51..006489d 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -66,6 +66,7 @@
 	default y if ARCH_VT8500
 	default y if PLAT_SPEAR
 	default y if ARCH_MSM
+	default y if MICROBLAZE
 	default PCI
 
 # ARM SA1111 chips have a non-PCI based "OHCI-compatible" USB host interface.