isdn: hisax: Fix test in waitforxfw

The negation makes it a bool before the comparison and hence it
will never be 0x40.

Signed-off-by: Roel Kluin <roel.kluin@gmail.com>
Cc: Karsten Keil <isdn@linux-pingi.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/drivers/isdn/hisax/diva.c b/drivers/isdn/hisax/diva.c
index 018bd29..0b0c2e5 100644
--- a/drivers/isdn/hisax/diva.c
+++ b/drivers/isdn/hisax/diva.c
@@ -382,7 +382,7 @@
 {
 	int to = 50;
 
-	while ((!(MemReadHSCX(cs, hscx, HSCX_STAR) & 0x44) == 0x40) && to) {
+	while (((MemReadHSCX(cs, hscx, HSCX_STAR) & 0x44) != 0x40) && to) {
 		udelay(1);
 		to--;
 	}