ARM: dts: sun6i: a31: Switch dma-names order for snps,dw-apb-uart nodes

Commit 370f696 ("dt-bindings: serial: snps-dw-apb-uart: add dma &
dma-names properties") documented dma-names property to handle Allwinner
D1 dtbs_check warnings, but relies on the rx->tx ordering, which is the
reverse of what a bunch of different boards expect.

The initial proposed solution was to allow a flexible dma-names order in
the binding, due to potential ABI breakage concerns after fixing the DTS
files. But luckily the Allwinner boards are not affected, since they are
using a shared DMA channel for rx and tx.

Hence, the first step in fixing the inconsistency was to change
dma-names order in the binding to tx->rx.

Do the same for the snps,dw-apb-uart nodes in the DTS file.

Signed-off-by: Cristian Ciocaltea <cristian.ciocaltea@collabora.com>
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/r/20230321215624.78383-3-cristian.ciocaltea@collabora.com
Signed-off-by: Jernej Skrabec <jernej.skrabec@gmail.com>

Author: cristicc

arch/arm/boot/dts/sun6i-a31.dtsi

@@ -822,7 +822,7 @@
 			clocks = <&ccu CLK_APB2_UART0>;
 			resets = <&ccu RST_APB2_UART0>;
 			dmas = <&dma 6>, <&dma 6>;
-			dma-names = "rx", "tx";
+			dma-names = "tx", "rx";
 			status = "disabled";
 		};
 
@@ -835,7 +835,7 @@
 			clocks = <&ccu CLK_APB2_UART1>;
 			resets = <&ccu RST_APB2_UART1>;
 			dmas = <&dma 7>, <&dma 7>;
-			dma-names = "rx", "tx";
+			dma-names = "tx", "rx";
 			status = "disabled";
 		};
 
@@ -848,7 +848,7 @@
 			clocks = <&ccu CLK_APB2_UART2>;
 			resets = <&ccu RST_APB2_UART2>;
 			dmas = <&dma 8>, <&dma 8>;
-			dma-names = "rx", "tx";
+			dma-names = "tx", "rx";
 			status = "disabled";
 		};
 
@@ -861,7 +861,7 @@
 			clocks = <&ccu CLK_APB2_UART3>;
 			resets = <&ccu RST_APB2_UART3>;
 			dmas = <&dma 9>, <&dma 9>;
-			dma-names = "rx", "tx";
+			dma-names = "tx", "rx";
 			status = "disabled";
 		};
 
@@ -874,7 +874,7 @@
 			clocks = <&ccu CLK_APB2_UART4>;
 			resets = <&ccu RST_APB2_UART4>;
 			dmas = <&dma 10>, <&dma 10>;
-			dma-names = "rx", "tx";
+			dma-names = "tx", "rx";
 			status = "disabled";
 		};
 
@@ -887,7 +887,7 @@
 			clocks = <&ccu CLK_APB2_UART5>;
 			resets = <&ccu RST_APB2_UART5>;
 			dmas = <&dma 22>, <&dma 22>;
-			dma-names = "rx", "tx";
+			dma-names = "tx", "rx";
 			status = "disabled";
 		};