Staging: vt6656: fix code indenting error in power.c

This patch fixes a code indentation error found by checkpatch.pl
where a line was indented with spaces instead of tabs
Signed-off-by: NJohannes Löthberg <johannes@kyriasis.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>