usb: phy: qmp: Remove writing of CDR_RESET_TIME register

The CDR_RESET_TIME register value is correctly updated with
the init settings from device tree, hence there is no need
to override it as part of the link training workarounds and
can be removed.

While at it, clean up the EQ_CONFIG5 register override. The
current SW workaround writes a hard-coded value, but this may
be incorrect if the init sequence has changed. Instead, read
back the previous value and only additionally write Bit 6,
which forces the link to re-train and is the originally
intended workaround for Gen2 interoperability issues.

Change-Id: Ie376917c1b9c91176be907866a0c02e8277462fb
Signed-off-by: Jack Pham <jackp@codeaurora.org>