ARM: dts: imx6ul: Add flexcan stop mode wakeup support

Add stop-mode property which is required by stop mode wakeup
feature.
Signed-off-by: NAisheng Dong <aisheng.dong@nxp.com>
Signed-off-by: NJoakim Zhang <qiangqing.zhang@nxp.com>
Signed-off-by: NShawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx6ul.dtsi

@@ -406,6 +406,7 @@
 				clocks = <&clks IMX6UL_CLK_CAN1_IPG>,
 					 <&clks IMX6UL_CLK_CAN1_SERIAL>;
 				clock-names = "ipg", "per";
+				fsl,stop-mode = <&gpr 0x10 1 0x10 17>;
 				status = "disabled";
 			};
 
@@ -416,6 +417,7 @@
 				clocks = <&clks IMX6UL_CLK_CAN2_IPG>,
 					 <&clks IMX6UL_CLK_CAN2_SERIAL>;
 				clock-names = "ipg", "per";
+				fsl,stop-mode = <&gpr 0x10 2 0x10 18>;
 				status = "disabled";
 			};