ARM: dts: bcm271x: Use a53 pmu, drop RPI364

The upstream bcm2837.dtsi uses cortex-a53-pmu, so we can do the same
but with a fallback to the cortex-a7-pmu which is supported by the
32-bit kernel.

Now that we're using the natural fallback mechanism of compatible
strings, the RPI364 macro no longer serves any purpose - remove it.

Signed-off-by: Phil Elwell <phil@raspberrypi.com>

arch/arm/boot/dts/bcm2710.dtsi

@@ -5,11 +5,7 @@
 	compatible = "brcm,bcm2837", "brcm,bcm2836";
 
 	arm-pmu {
-#ifdef RPI364
-		compatible = "arm,armv8-pmuv3", "arm,cortex-a7-pmu";
-#else
-		compatible = "arm,cortex-a7-pmu";
-#endif
+		compatible = "arm,cortex-a53-pmu", "arm,cortex-a7-pmu";
 	};
 
 	soc {

arch/arm64/boot/dts/broadcom/bcm2710-rpi-2-b.dts

@@ -1,3 +1 @@
-#define RPI364
-
 #include "../../../../arm/boot/dts/bcm2710-rpi-2-b.dts"

arch/arm64/boot/dts/broadcom/bcm2710-rpi-3-b-plus.dts

@@ -1,3 +1 @@
-#define RPI364
-
 #include "../../../../arm/boot/dts/bcm2710-rpi-3-b-plus.dts"

arch/arm64/boot/dts/broadcom/bcm2710-rpi-3-b.dts

@@ -1,3 +1 @@
-#define RPI364
-
 #include "../../../../arm/boot/dts/bcm2710-rpi-3-b.dts"

arch/arm64/boot/dts/broadcom/bcm2710-rpi-cm3.dts

@@ -1,3 +1 @@
-#define RPI364
-
 #include "../../../../arm/boot/dts/bcm2710-rpi-cm3.dts"

arch/arm64/boot/dts/broadcom/bcm2711-rpi-4-b.dts

@@ -1,3 +1 @@
-#define RPI364
-
 #include "../../../../arm/boot/dts/bcm2711-rpi-4-b.dts"