Staging: wlags49_h2: fix comments coding style issue in dhf.c

This is a patch to the dhf.c file that fixed up a TAB and spaces Errors
found by the checkpatch.pl tools, like
	do not use C99 // comments

Signed-off-by: Ruslan Pisarev <ruslan@rpisarev.org.ua>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>