ARM: dts: msm: fix slave-id of charger and FG on PMFALCON

Charger and Fuel Gauge peripherals are on slave-id 0. Update
charger and FG device node to reflect the same.

Change-Id: I99d1e47a20fd5c3304249aa4f6c64e5967874312
Signed-off-by: Ashay Jaiswal <ashayj@codeaurora.org>