Make 'Blink' as action for 'bmc_booted' group on Palmetto

It is a requirement that Firmware notifies users about its
READY state and the mechanism was to assert 'bmc_booted` group
which would result in user defined behavior on corresponding
physical LED. Blinking a particular physical LED is one of the
most common ways to let users know.

Currently on Palmetto and Barreleye, the behavior was set to ON
and this commit changes it to 'Blink' only on Palmetto and leaves
the Barreleye behavior as is based on the discussion with system
Engineer.

Change-Id: I4a976a8906ced0429c46967262208d9505c2f3e3
Signed-off-by: Vishwanatha Subbanna <vishwa@linux.vnet.ibm.com>
diff --git a/meta-openbmc-machines/meta-openpower/meta-ibm/meta-palmetto/recipes-phosphor/leds/palmetto-led-manager-config/led.yaml b/meta-openbmc-machines/meta-openpower/meta-ibm/meta-palmetto/recipes-phosphor/leds/palmetto-led-manager-config/led.yaml
index c9ba555..3b7d404 100755
--- a/meta-openbmc-machines/meta-openpower/meta-ibm/meta-palmetto/recipes-phosphor/leds/palmetto-led-manager-config/led.yaml
+++ b/meta-openbmc-machines/meta-openpower/meta-ibm/meta-palmetto/recipes-phosphor/leds/palmetto-led-manager-config/led.yaml
@@ -1,6 +1,6 @@
 BmcBooted:
     heartbeat:
-        Action: 'On'
+        Action: 'Blink'
         DutyOn: 50
         Period: 0
 PowerOn: