microblaze: Kconfig: Enable drivers for Microblaze

Signed-off-by: Michal Simek <monstr@monstr.eu>
diff --git a/drivers/usb/Kconfig b/drivers/usb/Kconfig
index c6c816b..5eee3f8 100644
--- a/drivers/usb/Kconfig
+++ b/drivers/usb/Kconfig
@@ -22,6 +22,7 @@
 	default y if PCMCIA && !M32R			# sl811_cs
 	default y if ARM				# SL-811
 	default y if SUPERH				# r8a66597-hcd
+	default y if MICROBLAZE
 	default PCI
 
 # many non-PCI SOC chips embed OHCI