Update LED Manager recipe to support Palmetto machine

This has the changes that enables LED group manager on Palmetto

Change-Id: Iaf4d4cc4c798c70e557009e9928225facb1d7d86
Signed-off-by: Vishwanatha Subbanna <vishwa@linux.vnet.ibm.com>
diff --git a/meta-palmetto/recipes-phosphor/leds/phosphor-led-manager%.bbappend b/meta-palmetto/recipes-phosphor/leds/phosphor-led-manager%.bbappend
new file mode 100644
index 0000000..2233e1c
--- /dev/null
+++ b/meta-palmetto/recipes-phosphor/leds/phosphor-led-manager%.bbappend
@@ -0,0 +1,3 @@
+FILESEXTRAPATHS_prepend := "${THISDIR}/${PN}:"
+
+SYSTEMD_LINK_${PN} += "../obmc-led-group-start@.service:${SYSTEMD_DEFAULT_TARGET}.wants/obmc-led-group-start@BmcBoot.service"