bt-power: Check reset-gpio status before calling BT reset

When bt-power driver is probed, it calls BT reset because of
the value of reset-gpio is high. So it needs to check reset-gpio
status before calling BT reset.

CRs-Fixed: 2495853
Change-Id: I88569ba4375931f3062afccba5c6699fdda50d3d
Signed-off-by: Junlin Zhang <junlzhan@codeaurora.org>