ARM: sunxi: Use the Synosys APB UART instead of ns8250

The UART controller used in the A10/A13 is the Synopsys DesignWare 8250.
The wrong use of a regular 8250 driver may lead to a oops during kernel
boot with "irq 17: nobody cared", because the apb UART as an extra
interrupt that gets raised when writing to the LCR when busy.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>

arch/arm/boot/dts/sunxi.dtsi

@@ -60,19 +60,21 @@ intc: interrupt-controller@01c20400 {
 		};
 
 		uart0: uart@01c28000 {
-			compatible = "ns8250";
+			compatible = "snps,dw-apb-uart";
 			reg = <0x01c28000 0x400>;
 			interrupts = <1>;
 			reg-shift = <2>;
+			reg-io-width = <4>;
 			clock-frequency = <24000000>;
 			status = "disabled";
 		};
 
 		uart1: uart@01c28400 {
-			compatible = "ns8250";
+			compatible = "snps,dw-apb-uart";
 			reg = <0x01c28400 0x400>;
 			interrupts = <2>;
 			reg-shift = <2>;
+			reg-io-width = <4>;
 			clock-frequency = <24000000>;
 			status = "disabled";
 		};