ARM: dts: mxs: Drop dma-apb interrupt-names

Drop "interrupt-names" property, since it is broken. The drivers/dma/mxs-dma.c
in Linux kernel does not use it, the property contains duplicate array entries
in existing DTs, and even malformed entries (gmpi, should have been gpmi). Get
rid of that optional property altogether.
Signed-off-by: Marek Vasut <marex@denx.de>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>

arch/arm/boot/dts/imx23.dtsi

@@ -64,8 +64,6 @@ dma_apbh: dma-apbh@80004000 {
 				reg = <0x80004000 0x2000>;
 				interrupts = <0 14 20 0
 					      13 13 13 13>;
-				interrupt-names = "empty", "ssp0", "ssp1", "empty",
-						  "gpmi0", "gpmi1", "gpmi2", "gpmi3";
 				#dma-cells = <1>;
 				dma-channels = <8>;
 				clocks = <&clks 15>;

arch/arm/boot/dts/imx28.dtsi

@@ -85,10 +85,6 @@ dma_apbh: dma-apbh@80004000 {
 					      88 88 88 88
 					      88 88 88 88
 					      87 86 0 0>;
-				interrupt-names = "ssp0", "ssp1", "ssp2", "ssp3",
-						  "gpmi0", "gmpi1", "gpmi2", "gmpi3",
-						  "gpmi4", "gmpi5", "gpmi6", "gmpi7",
-						  "hsadc", "lcdif", "empty", "empty";
 				#dma-cells = <1>;
 				dma-channels = <16>;
 				clocks = <&clks 25>;
@@ -1001,10 +997,6 @@ dma_apbx: dma-apbx@80024000 {
 					      80 81 68 69
 					      70 71 72 73
 					      74 75 76 77>;
-				interrupt-names = "auart4-rx", "auart4-tx", "spdif-tx", "empty",
-						  "saif0", "saif1", "i2c0", "i2c1",
-						  "auart0-rx", "auart0-tx", "auart1-rx", "auart1-tx",
-						  "auart2-rx", "auart2-tx", "auart3-rx", "auart3-tx";
 				#dma-cells = <1>;
 				dma-channels = <16>;
 				clocks = <&clks 26>;