volteer: Create lindar variant

Create the lindar variant of the volteer reference board by copying
the template files to a new directory named for the variant.

(Auto-Generated by create_coreboot_variant.sh version 4.1.2).

BUG=b:161089195
BRANCH=None
TEST=util/abuild/abuild -p none -t google/volteer -x -a
make sure the build includes GOOGLE_LINDAR

Signed-off-by: Julia Tsai <julia.tsai@lcfc.corp-partner.google.com>
Change-Id: I08923cde932b7304bcb01cd747530c87949e4692
Reviewed-on: https://review.coreboot.org/c/coreboot/+/44074
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Zhuohao Lee <zhuohao@google.com>
Reviewed-by: Caveh Jalali <caveh@chromium.org>
Reviewed-by: Angel Pons <th3fanbus@gmail.com>
diff --git a/src/mainboard/google/volteer/variants/lindar/overridetree.cb b/src/mainboard/google/volteer/variants/lindar/overridetree.cb
new file mode 100644
index 0000000..32204c5
--- /dev/null
+++ b/src/mainboard/google/volteer/variants/lindar/overridetree.cb
@@ -0,0 +1,6 @@
+chip soc/intel/tigerlake
+
+	device domain 0 on
+	end
+
+end