usb: xhci: tegra: Avoid memory leak in xhci driver

usb: xhci: tegra: Avoid memory leak in xhci driver

Avoid memory leak in the xhci driver by using
devm_kzalloc() for vbus_en_oc variable.

Bug 1623429

Signed-off-by: Petlozu Pravareshwar <petlozup@nvidia.com>
Change-Id: Ic46b9c63b29012f0a6613531aea55ff95131f78d
Reviewed-on: http://git-master/r/718905
Reviewed-by: Venkat Moganty <vmoganty@nvidia.com>
Tested-by: Venkat Moganty <vmoganty@nvidia.com>
Reviewed-on: http://git-master/r/807523
Reviewed-by: Automatic_Commit_Validation_User
Reviewed-by: Ajay Gupta <ajayg@nvidia.com>
Tested-by: Ajay Gupta <ajayg@nvidia.com>
GVS: Gerrit_Virtual_Submit
Reviewed-by: Ashutosh Jha <ajha@nvidia.com>