Add samsung specific changes

msm_kernel_extensions.bzl

@@ -0,0 +1,40 @@
+load("@bazel_skylib//rules:common_settings.bzl", "bool_flag")
+load("//msm-kernel/arch/arm64/boot/dts/vendor:qcom/platform_map.bzl", _get_dtb_list = "get_dtb_list", _get_dtbo_list = "get_dtbo_list")
+
+def define_top_level_rules():
+    for skippable in ["abl", "dtc", "abi"]:
+        bool_flag(name = "skip_{}".format(skippable), build_setting_default = False)
+
+        native.config_setting(
+            name = "skip_{}_setting".format(skippable),
+            flag_values = {":skip_{}".format(skippable): "1"},
+        )
+
+        native.config_setting(
+            name = "include_{}_setting".format(skippable),
+            flag_values = {":skip_{}".format(skippable): "0"},
+        )
+
+def define_combined_vm_image(target, variant, vm_size_ext4):
+    return
+
+def define_extras(target, flavor = None, alias = None):
+    return
+
+def get_build_config_fragments(target):
+    return []
+
+def get_dtb_list(target):
+    return _get_dtb_list(target)
+
+def get_dtbo_list(target):
+    return _get_dtbo_list(target)
+
+def get_dtstree(target):
+    return "//msm-kernel/arch/arm64/boot/dts/vendor:msm_dt"
+
+def get_vendor_ramdisk_binaries(target, flavor = None):
+    return None
+
+def get_gki_ramdisk_prebuilt_binary():
+    return None