Staging: dt3155_isr: cleanup fbuffer usage

Now that dt3155_drv.c is not dependent on the global symbol
dt3155_fbuffer[], declared in dt3155_isr.c, remove it.

This also fixes many of the coding style problems in dt3155_isr.c.
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>

drivers/staging/dt3155/dt3155_isr.h

@@ -36,8 +36,6 @@ MA 02111-1307 USA
 #ifndef DT3155_ISR_H
 #define DT3155_ISR_H
 
-extern struct dt3155_fbuffer *dt3155_fbuffer[MAXBOARDS];
-
 /* User functions for buffering */
 /* Initialize the buffering system.  This should */
 /* be called prior to enabling interrupts */