configs/kontron_pitx_imx8m_defconfig: add BR2_GLOBAL_PATCH_DIR

Add config option to set the board specific GLOBAL_PATCH_DIR.

Fixes: https://gitlab.com/buildroot.org/buildroot/-/jobs/2750360083

Signed-off-by: Heiko Thiery <heiko.thiery@gmail.com>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

configs/kontron_pitx_imx8m_defconfig

@@ -6,6 +6,7 @@ BR2_TARGET_GENERIC_GETTY_PORT="ttymxc2"
 BR2_ROOTFS_POST_BUILD_SCRIPT="board/kontron/pitx-imx8m/post-build.sh"
 BR2_ROOTFS_POST_IMAGE_SCRIPT="support/scripts/genimage.sh"
 BR2_ROOTFS_POST_SCRIPT_ARGS="-c $(BINARIES_DIR)/genimage.cfg"
+BR2_GLOBAL_PATCH_DIR="board/kontron/pitx-imx8m/patches"
 
 # Kernel
 BR2_LINUX_KERNEL=y