Code cleanup; make several boards compile & link.
diff --git a/cpu/arm926ejs/interrupts.c b/cpu/arm926ejs/interrupts.c
index 10841fd..3770660 100644
--- a/cpu/arm926ejs/interrupts.c
+++ b/cpu/arm926ejs/interrupts.c
@@ -293,7 +293,7 @@
 /* waits specified delay value and resets timestamp */
 void udelay_masked (unsigned long usec)
 {
-	ulong tmo, tmp;
+	ulong tmo;
 
 	if(usec >= 1000){               /* if "big" number, spread normalization to seconds */
 		tmo = usec / 1000;      /* start to normalize for usec to ticks per sec */