[MIPS] Alchemy: Get rid of au_ffs().

It was plain a bad idea ...

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
diff --git a/arch/mips/au1000/common/irq.c b/arch/mips/au1000/common/irq.c
index e86b430..b0ae1ab 100644
--- a/arch/mips/au1000/common/irq.c
+++ b/arch/mips/au1000/common/irq.c
@@ -481,7 +481,7 @@
 		return;
 	}
 #endif
-	irq = au_ffs(intc0_req0) - 1;
+	irq = ffs(intc0_req0);
 	intc0_req0 &= ~(1 << irq);
 	do_IRQ(irq);
 }
@@ -497,7 +497,7 @@
 	if (!intc0_req1)
 		return;
 
-	irq = au_ffs(intc0_req1) - 1;
+	irq = ffs(intc0_req1);
 	intc0_req1 &= ~(1 << irq);
 	do_IRQ(irq);
 }
@@ -517,7 +517,7 @@
 	if (!intc1_req0)
 		return;
 
-	irq = au_ffs(intc1_req0) - 1;
+	irq = ffs(intc1_req0);
 	intc1_req0 &= ~(1 << irq);
 	irq += 32;
 	do_IRQ(irq);
@@ -534,7 +534,7 @@
 	if (!intc1_req1)
 		return;
 
-	irq = au_ffs(intc1_req1) - 1;
+	irq = ffs(intc1_req1);
 	intc1_req1 &= ~(1 << irq);
 	irq += 32;
 	do_IRQ(irq);