[U-Boot-Users] Patch generalizing USB driver for MPC5200

1. This spatch removes the compiler warnings (integer made from pointer without cast)

2. it generalizes the Clock Divider Values and the Port Config for USB

if CONFIG_USB_CDMFDC5xxx and CONFIG_USB_GPSCFG5xxx are NOT defined, nothing changes.

Defining them allows for other system clocks than 528 MHz and/or other types of USB Port Configurations, for example single ended (#define CONFIG_USB_GPSCFG5xxx 0x00005000)

Thanks, Pierre, for the good work, the driver works fine on our board!