meta-amd: Add chassis control application

1. Remove the legacy AMD power control mechanism based off of phosphor
watchdog.
2. Removes "amd-powerctrl" app.
3. Add a new chassis power control app based off of x86-power-control
recipe with modifications needed to support EthanolX customer reference
board.
4. Update ethanolx configuration and packagegroup files to reflect the
above changes.

Change-Id: Icb361370fa57a0d10b4758ff688a8e607dec61d7
Signed-off-by: Supreeth Venkatesh <supreeth.venkatesh@amd.com>
diff --git a/meta-ethanolx/recipes-x86/chassis/x86-power-control_%.bbappend b/meta-ethanolx/recipes-x86/chassis/x86-power-control_%.bbappend
new file mode 100644
index 0000000..1780bac
--- /dev/null
+++ b/meta-ethanolx/recipes-x86/chassis/x86-power-control_%.bbappend
@@ -0,0 +1,3 @@
+FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
+
+SRC_URI += "file://0001-Amd-power-control-modifications-for-EthanolX.patch"