ARM: dts: msm: Update EPM rsense and gain values

Update EPM RSENSE and gain values for apq8084.
The RSENSE and gain values on the board are
specific to each channel are used to compute
the final current being reported to the client.

Change-Id: I3f65ec752ce88d8b6c1dcc59cdb4b8d13f87c96d
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>