mhi: cntrl: qcom: expand debug modes for new device bringup

When bringing up a new device attach to the host driver, MHI
controller can have more than one debug mode to allow for
configurable versions and make it easier to choose firmware
images and allow/disallow forced suspend/resume done to choose
new PHY settings.

Change-Id: Id2ecd98cfbaba40aca96bd167c34bfa5fd03818e
Signed-off-by: Bhaumik Bhatt <bbhatt@codeaurora.org>