meta-ampere: refine code structure

Restructure Ampere recipes to better reuse existing resource for
multiple platforms later.

Tested:
1. Compile without error.
2. Run regression test for related features without error.

Signed-off-by: Thang Q. Nguyen <thang@os.amperecomputing.com>
Change-Id: I5d034d21273b99be651f20dc2eb5549c1092f079
diff --git a/meta-ampere/meta-common/recipes-phosphor/watchdog/phosphor-watchdog_%.bbappend b/meta-ampere/meta-common/recipes-phosphor/watchdog/phosphor-watchdog_%.bbappend
new file mode 100644
index 0000000..7698091
--- /dev/null
+++ b/meta-ampere/meta-common/recipes-phosphor/watchdog/phosphor-watchdog_%.bbappend
@@ -0,0 +1,9 @@
+FILESEXTRAPATHS:append := "${THISDIR}/${PN}:"
+
+#
+# Ampere Mt. Jade power control involves different action during
+# the course of action which does not involve rebooting the Host.
+# Thus disable the use of Host Power-On watchdog.
+#
+WATCHDOG_FMT = ""
+ENABLE_WATCHDOG_FMT = ""