usb: mv_udc: Clean up mv_udc.h

Do a coding-style cleanup of this file and throw away useless
defined values. These values were likely a result of a copy-paste
job.

Signed-off-by: Marek Vasut <marex@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Cc: Lei Wen <leiwen@marvell.com>
Cc: Otavio Salvador <otavio@ossystems.com.br>
Cc: Stefano Babic <sbabic@denx.de>