fbdev: newport: newport_*wait() return 0 on timeout

With a postfix decrement t reaches -1 on timeout which results in a
return of 0.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Cc: Krzysztof Helt <krzysztof.h1@poczta.fm>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

include/video/newport.h

@@ -453,7 +453,7 @@ static __inline__ int newport_wait(struct newport_regs *regs)
 {
 	int t = BUSY_TIMEOUT;
 
-	while (t--)
+	while (--t)
 		if (!(regs->cset.status & NPORT_STAT_GBUSY))
 			break;
 	return !t;
@@ -463,7 +463,7 @@ static __inline__ int newport_bfwait(struct newport_regs *regs)
 {
 	int t = BUSY_TIMEOUT;
 
-	while (t--)
+	while (--t)
 		if(!(regs->cset.status & NPORT_STAT_BBUSY))
 			break;
 	return !t;