Add a function to reverse bytes within a 32 bit word.
Operate on a u32 rather than individual bytes.
Signed-off-by: NJoshua Clayton <stillcompiling@gmail.com>
Signed-off-by: NAlan Tull <atull@kernel.org>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>