meta-palmetto: Fix occ hwmon

1. Add openpower-occ-control into build to bind/unbind occ-hwmon driver;
2. Modify hwmon config to use the updated occ-hwmon device.

Change-Id: I5ad0f2b7b95b41ff216381e6689926201930d097
Signed-off-by: Lei YU <mine260309@gmail.com>
diff --git a/meta-palmetto/recipes-phosphor/packagegroups/packagegroup-obmc-apps.bbappend b/meta-palmetto/recipes-phosphor/packagegroups/packagegroup-obmc-apps.bbappend
new file mode 100644
index 0000000..e5b837a
--- /dev/null
+++ b/meta-palmetto/recipes-phosphor/packagegroups/packagegroup-obmc-apps.bbappend
@@ -0,0 +1 @@
+RDEPENDS_${PN}-inventory += "openpower-occ-control"