Marvell/Library: UtmiLib: Update USB2.0 analog settings

This patch introduce following modifications, allowing to
overcome the instabilities observed with certain USB2.0 endpoints:
* Add additional step which enables the Impedance and PLL calibration.
* Enable old squelch detector instead of the new analog squelch detector
  circuit and update host disconnect threshold value.
* Update LS TX driver strength coarse and fine adjustment values.

Based on original change from Grzegorz Jaszczyk <jaz@semihalf.com>

Signed-off-by: Marcin Wojtas <mw@semihalf.com>
Reviewed-by: Leif Lindholm <leif@nuviainc.com>