ARM: mx5: Fix MX53 flexcan2 clock

The second FlexCAN port uses different clock than the first one, configure
correct clock to prevent hanging of the system during bringing up of the port.
Signed-off-by: NMarek Vasut <marex@denx.de>
Cc: Fabio Estevam <fabio.estevam@freescale.com>
Acked-by: NSascha Hauer <s.hauer@pengutronix.de>
Signed-off-by: NShawn Guo <shawn.guo@linaro.org>

arch/arm/boot/dts/imx53.dtsi

@@ -492,7 +492,7 @@
 				compatible = "fsl,imx53-flexcan", "fsl,p1010-flexcan";
 				reg = <0x53fcc000 0x4000>;
 				interrupts = <83>;
-				clocks = <&clks 158>, <&clks 157>;
+				clocks = <&clks 87>, <&clks 86>;
 				clock-names = "ipg", "per";
 				status = "disabled";
 			};