ARM: dts: stm32: activate alternate REQ/ACK dma protocol for uart

Default REQ/ACK DMA protocol consists in maintaining ACK signal up to the
removal of REQuest and the transfer completion.
In case of alternative REQ/ACK protocol, ACK de-assertion does not wait the
removal of the REQuest, but only the transfer completion.
Due to a possible DMA stream lock when transferring data to/from STM32
USART/UART, select this alternative protocol in STM32 USART/UART nodes.

Signed-off-by: Valentin Caron <valentin.caron@st.com>
Change-Id: Ia5c1205e1a74a06ff670006e9fbf619ad45deeb5
Reviewed-on: https://gerrit.st.com/c/mpu/oe/st/linux-stm32/+/186820
Reviewed-by: CITOOLS <smet-aci-reviews@lists.codex.cro.st.com>
Reviewed-by: CIBUILD <smet-aci-builds@lists.codex.cro.st.com>
Reviewed-by: Fabrice GASNIER <fabrice.gasnier@st.com>

Author: VCASTM

arch/arm/boot/dts/stm32mp151.dtsi

@@ -535,8 +535,8 @@
 			clocks = <&rcc USART2_K>;
 			wakeup-source;
 			power-domains = <&pd_core>;
-			dmas = <&dmamux1 43 0x400 0x5>,
-			       <&dmamux1 44 0x400 0x1>;
+			dmas = <&dmamux1 43 0x400 0x15>,
+			       <&dmamux1 44 0x400 0x11>;
 			dma-names = "rx", "tx";
 			status = "disabled";
 		};
@@ -548,8 +548,8 @@
 			clocks = <&rcc USART3_K>;
 			wakeup-source;
 			power-domains = <&pd_core>;
-			dmas = <&dmamux1 45 0x400 0x5>,
-			       <&dmamux1 46 0x400 0x1>;
+			dmas = <&dmamux1 45 0x400 0x15>,
+			       <&dmamux1 46 0x400 0x11>;
 			dma-names = "rx", "tx";
 			status = "disabled";
 		};
@@ -561,8 +561,8 @@
 			clocks = <&rcc UART4_K>;
 			wakeup-source;
 			power-domains = <&pd_core>;
-			dmas = <&dmamux1 63 0x400 0x5>,
-			       <&dmamux1 64 0x400 0x1>;
+			dmas = <&dmamux1 63 0x400 0x15>,
+			       <&dmamux1 64 0x400 0x11>;
 			dma-names = "rx", "tx";
 			status = "disabled";
 		};
@@ -574,8 +574,8 @@
 			clocks = <&rcc UART5_K>;
 			wakeup-source;
 			power-domains = <&pd_core>;
-			dmas = <&dmamux1 65 0x400 0x5>,
-			       <&dmamux1 66 0x400 0x1>;
+			dmas = <&dmamux1 65 0x400 0x15>,
+			       <&dmamux1 66 0x400 0x11>;
 			dma-names = "rx", "tx";
 			status = "disabled";
 		};
@@ -696,8 +696,8 @@
 			clocks = <&rcc UART7_K>;
 			wakeup-source;
 			power-domains = <&pd_core>;
-			dmas = <&dmamux1 79 0x400 0x5>,
-			       <&dmamux1 80 0x400 0x1>;
+			dmas = <&dmamux1 79 0x400 0x15>,
+			       <&dmamux1 80 0x400 0x11>;
 			dma-names = "rx", "tx";
 			status = "disabled";
 		};
@@ -709,8 +709,8 @@
 			clocks = <&rcc UART8_K>;
 			wakeup-source;
 			power-domains = <&pd_core>;
-			dmas = <&dmamux1 81 0x400 0x5>,
-			       <&dmamux1 82 0x400 0x1>;
+			dmas = <&dmamux1 81 0x400 0x15>,
+			       <&dmamux1 82 0x400 0x11>;
 			dma-names = "rx", "tx";
 			status = "disabled";
 		};
@@ -794,8 +794,8 @@
 			clocks = <&rcc USART6_K>;
 			wakeup-source;
 			power-domains = <&pd_core>;
-			dmas = <&dmamux1 71 0x400 0x5>,
-			       <&dmamux1 72 0x400 0x1>;
+			dmas = <&dmamux1 71 0x400 0x15>,
+			       <&dmamux1 72 0x400 0x11>;
 			dma-names = "rx", "tx";
 			status = "disabled";
 		};