SpacemiT: legacy: Add kernel dt auto-patcher

patch/kernel/spacemit-legacy-6.1/0000.patching_config.yaml

@@ -0,0 +1,45 @@
+config: # This is file 'patch/kernel/spacemit-legacy-6.1/0000.patching_config.yaml'
+
+  # PATCH NUMBERING INFO
+  #
+  # Patches should be ordered in such a way that general kernel patches are applied first, then SoC-related patches and at last board-specific patches
+  #
+  # Patch numbers in this folder are sorted by category:
+  #
+  # 000* for general patches
+  # 0**  for Bianbu-Linux-related patches
+  # 1**  for other SoC-related patches
+  # 5**  for board specific patches
+
+  # Just some info stuff; not used by the patching scripts
+  name: spacemit-6.1
+  kind: kernel
+  type: vendor # or: vendor
+  branch: linux-6.1.y
+  last-known-good-tag: v6.1.15
+  maintainers:
+    - { github: none, name: none, email: none, armbian-forum: none }
+
+  # .dts files in these directories will be copied as-is to the build tree; later ones overwrite earlier ones.
+  # This is meant to provide a way to "add a board DTS" without having to null-patch them in.
+  dts-directories:
+    - { source: "dt", target: "arch/riscv/boot/dts/spacemit" }
+
+  # Every file in these directories will be copied as-is to the build tree; later ones overwrite earlier ones
+  # This is meant as a way to have overlays, bare, in a directory, without having to null-patch them in.
+  # @TODO need a solution to auto-Makefile the overlays as well
+  overlay-directories:
+    - { source: "overlay", target: "arch/riscv/boot/dts/spacemit/overlay" }
+
+  # The Makefile in each of these directories will be magically patched to include the dts files copied
+  # or patched-in; overlay subdir will be included "-y" if it exists.
+  # No more Makefile patching needed, yay!
+  auto-patch-dt-makefile:
+    - { directory: "arch/riscv/boot/dts/spacemit", config-var: "CONFIG_SOC_SPACEMIT_K1X" }
+
+  # Configuration for when applying patches to git / auto-rewriting patches (development cycle helpers)
+  patches-to-git:
+    do-not-commit-files:
+      - "MAINTAINERS" # constant churn, drop them. sorry.
+    do-not-commit-regexes: # Python-style regexes
+      - "^arch/([a-zA-Z0-9]+)/boot/dts/([a-zA-Z0-9]+)/Makefile$" # ignore DT Makefile patches, we've an auto-patcher now