usb: phy: qusb2: Update tune value for host mode

Currently driver is relying on the efuse and the tune
value passed from DT for device mode to update the TUNE1
register. Since the host mode sequence can have a different
tune value passed from DT, it should be honored too.
This change removes an extra check for tune value which will
ensure that TUNE1 register gets updated both in device and
host mode.

Change-Id: Idbbd6426b7fd8c7cbdbacba1295849e1fe75c871
Signed-off-by: Pratham Pratap <prathampratap@codeaurora.org>