usb: dwc2: Move reset into dwc2_get_hwparams()

The reset is required to get reset values of the hardware parameters but
the force mode is not. Move the base reset into dwc2_get_hwparams() and
do the reset and force mode afterwards.

Signed-off-by: John Youn <johnyoun@synopsys.com>
Signed-off-by: Felipe Balbi <balbi@ti.com>