powerpc/mpc8544ds: Add USB controller support for MPC8544DS

USB controller in uboot is a required feature for MPC8544DS. Without this
support there is no 'usb' command in uboot.

Signed-off-by: Jia Hongtao <B38951@freescale.com>
Signed-off-by: Li Yang <leoli@freescale.com>
Signed-off-by: Andy Fleming <afleming@freescale.com>
1 file changed