s2io.c: Make more conforming to normal kernel style

Still has a few long lines.

checkpatch was:
	total: 263 errors, 53 warnings, 8751 lines checked
is:
	total: 4 errors, 35 warnings, 8767 lines checked

Signed-off-by: Joe Perches <[email protected]>
Acked-by: Sreenivasa Honnur <[email protected]>
Signed-off-by: David S. Miller <[email protected]>

Author: JoePerches