dragonboards: Enable system_dlkm partition support

Enabling system_dlkm partition support. We plan to use it to
flash and use system_dlkm.img prebuilt from ci.android.com
directly. For now this partition is just a stub or place
holder while we segregate vendor kernel modules into
vendor_ramdisk and vendor_dlkm groups.

We are re-using dlkm_vendor service, hosted by Cuttelfish
project, which will take care of modprobing kernel modules.

Change-Id: I7291fcd430ec76e4f33c9d2d23c4ee8aef159c76
Signed-off-by: Amit Pundir <amit.pundir@linaro.org>
diff --git a/shared/utils/dlkm_loader/dlkm_loader.rc b/shared/utils/dlkm_loader/dlkm_loader.rc
new file mode 100644
index 0000000..7af8bac
--- /dev/null
+++ b/shared/utils/dlkm_loader/dlkm_loader.rc
@@ -0,0 +1,10 @@
+on early-init
+    # start module load in the background
+    start vendor.dlkm_loader
+
+service vendor.dlkm_loader /vendor/bin/dlkm_loader
+    class main
+    user root
+    group root system
+    disabled
+    oneshot