usb: phy: tegra: allow host peripheral transitions

usb: phy: tegra: allow host peripheral transitions

Allow otg state machine transitions from host to
pheripheral and vice-versa.

Bug 1653886

Change-Id: I55c6b6bcf7c5cc33ecfd8e9063faed88aa54ccc2
Signed-off-by: Rakesh Babu Bodla <rbodla@nvidia.com>
Reviewed-on: http://git-master/r/826937
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Haribabu Narayanan <hnarayanan@nvidia.com>
Tested-by: Haribabu Narayanan <hnarayanan@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Laxman Dewangan <ldewangan@nvidia.com>