board-8930: Use (Max RPM SWFI+1 ) as SWFI latency when HSUSB is connected

When HSUSB is active, use ( Max RPM SWFI + 1 ) value as SWFI latency which
would not allow APPS to enter into SWFI for better HSUSB performance.

Change-Id: I83d2cb528dd3915de81078dbc42c36143ad7a521
Signed-off-by: Mayank Rana <mrana@codeaurora.org>