arm64: dts: xilinx: add soc-specific spi compatibles for zynqmp/versal-net

Unlike zynq, which has a specific compatible for the Cadence spi
controller, zynqmp and versal-net do not have specific compatibles.
In order to "encourage" people to use soc-specific compatibles for new
devices using this IP, add specific compatibles for these devices, with
a fallback to the existing compatible for the r1p6 version of the IP so
that there will be no functional change.

Signed-off-by: Conor Dooley <conor.dooley@microchip.com>
Acked-by: Michal Simek <michal.simek@amd.com>
Link: https://lore.kernel.org/r/20251001-cheesy-shucking-c55431bbcae3@spud
Signed-off-by: Michal Simek <michal.simek@amd.com>

Author: ConchuOD

arch/arm64/boot/dts/xilinx/versal-net.dtsi

@@ -1018,15 +1018,15 @@
 		};
 
 		spi0: spi@f1960000 {
-			compatible = "cdns,spi-r1p6";
+			compatible = "xlnx,versal-net-spi-r1p6", "cdns,spi-r1p6";
 			status = "disabled";
 			interrupts = <0 23 4>;
 			reg = <0 0xf1960000 0 0x1000>;
 			clock-names = "ref_clk", "pclk";
 		};
 
 		spi1: spi@f1970000 {
-			compatible = "cdns,spi-r1p6";
+			compatible = "xlnx,versal-net-spi-r1p6", "cdns,spi-r1p6";
 			status = "disabled";
 			interrupts = <0 24 4>;
 			reg = <0 0xf1970000 0 0x1000>;

arch/arm64/boot/dts/xilinx/zynqmp.dtsi

@@ -1080,7 +1080,7 @@
 		};
 
 		spi0: spi@ff040000 {
-			compatible = "cdns,spi-r1p6";
+			compatible = "xlnx,zynqmp-spi-r1p6", "cdns,spi-r1p6";
 			status = "disabled";
 			interrupt-parent = <&gic>;
 			interrupts = <GIC_SPI 19 IRQ_TYPE_LEVEL_HIGH>;
@@ -1092,7 +1092,7 @@
 		};
 
 		spi1: spi@ff050000 {
-			compatible = "cdns,spi-r1p6";
+			compatible = "xlnx,zynqmp-spi-r1p6", "cdns,spi-r1p6";
 			status = "disabled";
 			interrupt-parent = <&gic>;
 			interrupts = <GIC_SPI 20 IRQ_TYPE_LEVEL_HIGH>;