Staging: rt2860: fix coding style issue in rt3070.c, rt3090.c, rt30xx.c

This is a patch to the rt3070.c, rt3090.c, rt30xx.c files that fixes up
errors found by the checkpatch.pl tool

Signed-off-by: Gorskin Ilya <revent82@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>