ARM: imx53: qsrb: fix PMIC interrupt level

The MC34708 PMIC interrupt level is active high, but was set to
active low in the devicetree, probably as a result of a copy and
paste error from the QSB board.

This caused IRQ storms and led to the kernel disabling the PMIC
interrupt.

Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx53-qsrb.dts

@@ -36,7 +36,7 @@
 		pinctrl-0 = <&pinctrl_pmic>;
 		reg = <0x08>;
 		interrupt-parent = <&gpio5>;
-		interrupts = <23 0x8>;
+		interrupts = <23 IRQ_TYPE_LEVEL_HIGH>;
 		regulators {
 			sw1_reg: sw1a {
 				regulator-name = "SW1";