configs/zynqmp_*: move to external Bootlin stable toolchain

This moves the zynqmp defconfigs to the Bootlin glibc stable external toolchain
as per[1].

[1]: https://elinux.org/Buildroot:DeveloperDaysELCE2024#Rules_for_defconfigs

This patch has been run-tested on the zcu106 evaluation board.
This patch has been run-tested on the kv260 starter kit.

Signed-off-by: Neal Frager <neal.frager@amd.com>
Signed-off-by: Julien Olivain <ju.o@free.fr>

configs/zynqmp_kria_kd240_defconfig

@@ -1,5 +1,7 @@
 BR2_aarch64=y
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_6_12=y
+BR2_TOOLCHAIN_EXTERNAL=y
+BR2_TOOLCHAIN_EXTERNAL_BOOTLIN=y
+BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_AARCH64_GLIBC_STABLE=y
 BR2_TOOLCHAIN_BARE_METAL_BUILDROOT=y
 BR2_TOOLCHAIN_BARE_METAL_BUILDROOT_ARCH="microblazeel-buildroot-elf"
 BR2_GLOBAL_PATCH_DIR="board/xilinx/patches board/xilinx/linux_6.12/patches"

configs/zynqmp_kria_kr260_defconfig

@@ -1,5 +1,7 @@
 BR2_aarch64=y
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_6_12=y
+BR2_TOOLCHAIN_EXTERNAL=y
+BR2_TOOLCHAIN_EXTERNAL_BOOTLIN=y
+BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_AARCH64_GLIBC_STABLE=y
 BR2_TOOLCHAIN_BARE_METAL_BUILDROOT=y
 BR2_TOOLCHAIN_BARE_METAL_BUILDROOT_ARCH="microblazeel-buildroot-elf"
 BR2_GLOBAL_PATCH_DIR="board/xilinx/patches board/xilinx/linux_6.12/patches"

configs/zynqmp_kria_kv260_defconfig

@@ -1,5 +1,7 @@
 BR2_aarch64=y
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_6_12=y
+BR2_TOOLCHAIN_EXTERNAL=y
+BR2_TOOLCHAIN_EXTERNAL_BOOTLIN=y
+BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_AARCH64_GLIBC_STABLE=y
 BR2_TOOLCHAIN_BARE_METAL_BUILDROOT=y
 BR2_TOOLCHAIN_BARE_METAL_BUILDROOT_ARCH="microblazeel-buildroot-elf"
 BR2_GLOBAL_PATCH_DIR="board/xilinx/patches board/xilinx/linux_6.12/patches"

configs/zynqmp_zcu102_defconfig

@@ -1,5 +1,7 @@
 BR2_aarch64=y
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_6_12=y
+BR2_TOOLCHAIN_EXTERNAL=y
+BR2_TOOLCHAIN_EXTERNAL_BOOTLIN=y
+BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_AARCH64_GLIBC_STABLE=y
 BR2_TOOLCHAIN_BARE_METAL_BUILDROOT=y
 BR2_TOOLCHAIN_BARE_METAL_BUILDROOT_ARCH="microblazeel-buildroot-elf"
 BR2_GLOBAL_PATCH_DIR="board/xilinx/patches board/xilinx/linux_6.12/patches"

configs/zynqmp_zcu104_defconfig

@@ -1,5 +1,7 @@
 BR2_aarch64=y
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_6_12=y
+BR2_TOOLCHAIN_EXTERNAL=y
+BR2_TOOLCHAIN_EXTERNAL_BOOTLIN=y
+BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_AARCH64_GLIBC_STABLE=y
 BR2_TOOLCHAIN_BARE_METAL_BUILDROOT=y
 BR2_TOOLCHAIN_BARE_METAL_BUILDROOT_ARCH="microblazeel-buildroot-elf"
 BR2_GLOBAL_PATCH_DIR="board/xilinx/patches board/xilinx/linux_6.12/patches"

configs/zynqmp_zcu106_defconfig

@@ -1,5 +1,7 @@
 BR2_aarch64=y
-BR2_PACKAGE_HOST_LINUX_HEADERS_CUSTOM_6_12=y
+BR2_TOOLCHAIN_EXTERNAL=y
+BR2_TOOLCHAIN_EXTERNAL_BOOTLIN=y
+BR2_TOOLCHAIN_EXTERNAL_BOOTLIN_AARCH64_GLIBC_STABLE=y
 BR2_TOOLCHAIN_BARE_METAL_BUILDROOT=y
 BR2_TOOLCHAIN_BARE_METAL_BUILDROOT_ARCH="microblazeel-buildroot-elf"
 BR2_GLOBAL_PATCH_DIR="board/xilinx/patches board/xilinx/linux_6.12/patches"