configs/acmesystems_acqua_a5_*: switch to BR2_LINUX_KERNEL_CUSTOM_DTS_DIR

Before updating the kernel to 6.12 version, use the newly introduced
BR2_LINUX_KERNEL_CUSTOM_DTS_DIR option to provide the Out-of-tree
Device Tree Source file with its vendor subdirectory that is needed
since kernel 6.12 [1].

Revert the sama5d31.dtsi include path update added by the previous
kernel version bump 6.6.12 [2].

As noticed by Michael Walle, newer OOT device trees should use the
same #include directives as the in-tree device trees to ease
sharing the files between u-boot, linux and OOT external trees [3].

[1] https://lists.buildroot.org/pipermail/buildroot/2024-October/765463.html
[2] 8fb5209885 ("configs/acmesystems_acqua_a5_*: bump to Linux 6.6.12")
[3] https://lore.kernel.org/buildroot/D6UG5Z1HUN9N.GWVHB4L823ZC@kernel.org/

Cc: Edgar Bonet <bonet@grenoble.cnrs.fr>
Acked-by: Edgar Bonet <bonet@grenoble.cnrs.fr>
Tested-by: Edgar Bonet <bonet@grenoble.cnrs.fr>
Signed-off-by: Romain Naour <romain.naour@smile.fr>
Reviewed-by: Niklas Cassel <niklas.cassel@wdc.com>
Signed-off-by: Romain Naour <romain.naour@smile.fr>
Signed-off-by: Julien Olivain <ju.o@free.fr>

board/acmesystems/acqua-a5/at91-sama5d3_acqua.dts → board/acmesystems/acqua-a5/dts/microchip/at91-sama5d3_acqua.dts

@@ -9,7 +9,7 @@
  * Licensed under GPLv2 or later.
  */
 /dts-v1/;
-#include "microchip/sama5d31.dtsi"
+#include "sama5d31.dtsi"
 
 / {
 	model = "Acme Systems Acqua SOM";

configs/acmesystems_acqua_a5_256mb_defconfig

@@ -13,7 +13,7 @@ BR2_LINUX_KERNEL_CUSTOM_VERSION=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.6.30"
 BR2_LINUX_KERNEL_DEFCONFIG="sama5"
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
-BR2_LINUX_KERNEL_CUSTOM_DTS_PATH="board/acmesystems/acqua-a5/at91-sama5d3_acqua.dts"
+BR2_LINUX_KERNEL_CUSTOM_DTS_DIR="board/acmesystems/acqua-a5/dts"
 BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
 BR2_TARGET_ROOTFS_EXT2=y
 BR2_TARGET_ROOTFS_EXT2_4=y

configs/acmesystems_acqua_a5_512mb_defconfig

@@ -13,7 +13,7 @@ BR2_LINUX_KERNEL_CUSTOM_VERSION=y
 BR2_LINUX_KERNEL_CUSTOM_VERSION_VALUE="6.6.30"
 BR2_LINUX_KERNEL_DEFCONFIG="sama5"
 BR2_LINUX_KERNEL_DTS_SUPPORT=y
-BR2_LINUX_KERNEL_CUSTOM_DTS_PATH="board/acmesystems/acqua-a5/at91-sama5d3_acqua.dts"
+BR2_LINUX_KERNEL_CUSTOM_DTS_DIR="board/acmesystems/acqua-a5/dts"
 BR2_LINUX_KERNEL_NEEDS_HOST_OPENSSL=y
 BR2_TARGET_ROOTFS_EXT2=y
 BR2_TARGET_ROOTFS_EXT2_4=y