microblaze: Do not show error message for 32 interrupt lines

When interrupt controller uses 32 interrupts lines the kernel
show error message about mismatch in kind-of-intr parameter
because it exceeds u32. Recast fixs this issue.
Signed-off-by: Michal Simek <monstr@monstr.eu>

arch/microblaze/kernel/intc.c

@@ -134,7 +134,7 @@ void __init init_IRQ(void)
 	intr_type =
 		be32_to_cpup(of_get_property(intc,
 						"xlnx,kind-of-intr", NULL));
-	if (intr_type >= (1 << (nr_irq + 1)))
+	if (intr_type > (u32)((1ULL << nr_irq) - 1))
 		printk(KERN_INFO " ERROR: Mismatch in kind-of-intr param\n");
 
 #ifdef CONFIG_SELFMOD_INTC