configs/raspberrypi{3, 4}_64: enabling BR2_LINUX_KERNEL_DTB_OVERLAY_SUPPORT no longer needed

BR2_LINUX_KERNEL_DTB_OVERLAY_SUPPORT is now forcefully selected by
BR2_PACKAGE_RPI_FIRMWARE_INSTALL_DTB_OVERLAYS when the kernel is in
charge of building DTBs (BR2_LINUX_KERNEL_DTS_SUPPORT=y). So enabling
BR2_LINUX_KERNEL_DTB_OVERLAY_SUPPORT is no longer needed in the 64-bit
defconfigs for Raspberry Pi 3 and 4.

Signed-off-by: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
Signed-off-by: Yann E. MORIN <yann.morin.1998@free.fr>

configs/raspberrypi3_64_defconfig

@@ -17,7 +17,6 @@ BR2_LINUX_KERNEL_DEFCONFIG="bcmrpi3"
 # Build the DTB from the kernel sources
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
 BR2_LINUX_KERNEL_INTREE_DTS_NAME="broadcom/bcm2710-rpi-3-b broadcom/bcm2710-rpi-3-b-plus broadcom/bcm2837-rpi-3-b"
-BR2_LINUX_KERNEL_DTB_OVERLAY_SUPPORT=y
 
 BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
 

configs/raspberrypi4_64_defconfig

@@ -17,7 +17,6 @@ BR2_LINUX_KERNEL_DEFCONFIG="bcm2711"
 # Build the DTB from the kernel sources
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
 BR2_LINUX_KERNEL_INTREE_DTS_NAME="broadcom/bcm2711-rpi-4-b"
-BR2_LINUX_KERNEL_DTB_OVERLAY_SUPPORT=y
 
 BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y