USB: xhci: fix OS want to own HC

Software should set XHCI_HC_OS_OWNED bit to request ownership of xHC.

This patch should be backported to kernels as far back as 2.6.31.

Signed-off-by: JiSheng Zhang <jszhang3@gmail.com>
Signed-off-by: Sarah Sharp <sarah.a.sharp@linux.intel.com>
Cc: stable@kernel.org