net: sh-eth: Fix coding style checked by checkpatch.pl

This fixes the chord style checked by checkpatch.pl.
Details of change details are as follows:

 - Fix typo
    Change from alligned to aligned.
 - Remove whitespace before ','
 - Add spaces preferred around that '|'
 - Fix missing a blank line after declarations
 - Remove space after a cast declaration
 - Fix format of block comments
 - Add a blank line after function/struct/union/enum declarations

Signed-off-by: Nobuhiro Iwamatsu <iwamatsu@nigauri.org>
Acked-by: Joe Hershberger <joe.hershberger@ni.com>