sis900: Trivial: Fix typos in enums
sis900: Trivial: Fix typos in enums

"reigster" -> "register"

Signed-off-by: Nik Nyby <a28cc654d85c1d3cb8418061db20859c322a0bc6@gnu.org>
Signed-off-by: David S. Miller <fe08d3c717adf2ae63592e4c9aec6e3e404d8e3e@davemloft.net>

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