blackfin: mach-common: ints-priority: fix compile error

IRQ_PINT4/PINT5 are not defined on !CONFIG_BF60x, this patch fix it.
Signed-off-by: NBob Liu <lliubbo@gmail.com>

arch/blackfin/mach-common/ints-priority.c

@@ -1107,12 +1107,14 @@ static int bfin_gpio_set_wake(struct irq_data *d, unsigned int state)
 	case 1:
 		pint_irq = IRQ_PINT1;
 		break;
+#ifdef CONFIG_BF60x
 	case 4:
 		pint_irq = IRQ_PINT4;
 		break;
 	case 5:
 		pint_irq = IRQ_PINT5;
 		break;
+#endif
 	default:
 		return -EINVAL;
 	}