Staging: dt3155_drv.c: dereference dt3155_status[]

Where used, dereference the global symbol dt3155_status[] as a local
pointer.  This improves the readability of the code and reduces the
overall length of some of the really long lines.

Signed-off-by: H Hartley Sweeten <hsweeten@visionengravers.com>
Cc: Scott Smedley <ss@aao.gov.au>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>