ARM: dts: imx: remove old DMA binding data from gpmi node

After mxs-dma driver adopts generic DMA device tree binding, gpmi
channel interrupt number is defined in DMA controller node, and
channel ID is listed in "dmas" property.  So the DMA channel interrupt
number in gpmi node "interrupts" property and fsl,gpmi-dma-channel which
are used by old customized DMA binding can be removed now.

Signed-off-by: Shawn Guo <shawn.guo@linaro.org>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>

arch/arm/boot/dts/imx6qdl.dtsi

@@ -88,15 +88,14 @@
 			#size-cells = <1>;
 			reg = <0x00112000 0x2000>, <0x00114000 0x2000>;
 			reg-names = "gpmi-nand", "bch";
-			interrupts = <0 13 0x04>, <0 15 0x04>;
-			interrupt-names = "gpmi-dma", "bch";
+			interrupts = <0 15 0x04>;
+			interrupt-names = "bch";
 			clocks = <&clks 152>, <&clks 153>, <&clks 151>,
 				 <&clks 150>, <&clks 149>;
 			clock-names = "gpmi_io", "gpmi_apb", "gpmi_bch",
 				      "gpmi_bch_apb", "per1_bch";
 			dmas = <&dma_apbh 0>;
 			dma-names = "rx-tx";
-			fsl,gpmi-dma-channel = <0>;
 			status = "disabled";
 		};