USB: EHCI: Add bus glue for GRLIB GRUSBHC controller

This patch adds support for the GRLIB GRUSBHC EHCI controller from
Aeroflex Gaisler. The controller is typically found on LEON/GRLIB
SoCs.

Tested on GR-LEON4-ITX with with little endian interface and on
LEON3 system on GR-PCI-XC5V development board for big endian
controller.

Signed-off-by: Jan Andersson <jan@gaisler.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>

drivers/usb/Kconfig

@@ -68,6 +68,7 @@ config USB_ARCH_HAS_EHCI
 	default y if PLAT_S5P
 	default y if ARCH_MSM
 	default y if MICROBLAZE
+	default y if SPARC_LEON
 	default PCI
 
 # ARM SA1111 chips have a non-PCI based "OHCI-compatible" USB host interface.