xhci: mem: Drop useless return:s

When function returns void and we have if-else-if chain, there is
no need to explicitly call return. Drop them and indent lines better.

While at it, make if-chain sorted from testing bigger values to smaller.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Mathias Nyman <mathias.nyman@linux.intel.com>
Link: https://lore.kernel.org/r/20230317154715.535523-5-mathias.nyman@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>