msm: power: update copyright markings

In cherry-picking patches from tip, the LTC charger driver and pm8921
BMS driver header were updated without updating the copyright
marking from "Code Aurora Forum" to "The Linux Foundation".

Fix this by updating the copyrights now

Change-Id: I3a24feaa6af5acbdca4fc6499398205a1c93dcfe
Signed-off-by: Xiaozhe Shi <xiaozhes@codeaurora.org>