d2: enable pulsing led while booting

Change-Id: Ia36dcb97b1a3a3e26359783728c36ce2fb9bcc6b
d2: prevent boot led from overriding charging led

make nard happy

Change-Id: I239b7d6ebf9911e86212a4d40dee361018e9f97c
d2: prevent boot led from overriding charging led, take 2

Also move declarations from init.target.rc, which gets executed in
charger mode, to init.qcom.rc, which does not. Otherwise boot pulse
blinks in charger mode

Change-Id: If85d326b2efc64e0bc426fce197ff1b4a3b9911e