[PARISC] use fls_long in irq.c


Signed-off-by: Kyle McMartin <kyle@parisc-linux.org>
diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c
index b39c5b9..e9d09b0 100644
--- a/arch/parisc/kernel/irq.c
+++ b/arch/parisc/kernel/irq.c
@@ -336,11 +336,7 @@
 
 static inline int eirr_to_irq(unsigned long eirr)
 {
-#ifdef CONFIG_64BIT
-	int bit = fls64(eirr);
-#else
-	int bit = fls(eirr);
-#endif
+	int bit = fls_long(eirr);
 	return (BITS_PER_LONG - bit) + TIMER_IRQ;
 }