xhci: unify cycle state toggling operation with 'XOR'
xhci: unify cycle state toggling operation with 'XOR'

Some toggling operation in xHCI driver still use conditional toggling:
ring->cycle_state = (ring->cycle_state ? 0 : 1);

Use XOR to invert the cycle state instead of a conditional toggle to unify
cycle state toggling operation in xHCI driver.

Signed-off-by: Lin Wang <bbd0dd38e694d6b6e4efa9648c08b20fdec765ba@intel.com>
Signed-off-by: Mathias Nyman <2d4473c5e67eb83655334d4e9a7757f781607241@linux.intel.com>
Signed-off-by: Greg Kroah-Hartman <4645f7897fd33786a2ee1264d590b3c400559d85@linuxfoundation.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs