rpi-base: Remove bcm2712-rpi-5-b.dtb from RPI_KERNEL_DEVICETREE target

All bcm2712 are built for arm64 builds alone and rpi-base.inc is included
by 32-bit machine configs as well. Recently, kernel moved thesr dts files
into arch/arm64/boot/dts/broadcom/ folder [1]

[1] https://github.com/raspberrypi/linux/commit/10c77e119eaaa2677009dea58cf69a8e5383925b

Signed-off-by: Khem Raj <raj.khem@gmail.com>

conf/machine/include/rpi-base.inc

@@ -99,7 +99,6 @@ RPI_KERNEL_DEVICETREE ?= " \
     broadcom/bcm2710-rpi-cm3.dtb \
     broadcom/bcm2711-rpi-cm4.dtb \
     broadcom/bcm2711-rpi-cm4s.dtb \
-    broadcom/bcm2712-rpi-5-b.dtb \
     "
 
 KERNEL_DEVICETREE ??= " \