hp/pavilion_m6_1035dx: Add ACPI support for reading battery level

Hook in the EC ASL code. This provides just enough information for the
OS to be able to read the battery information.

EC notifications (_Qxx) do not yet work, and it is unclear if the
issue is in the ACPI code, or if the hardware is not set up properly.
Thus, the OS must boot with the battery inserted in order to be able
to read its status.

Change-Id: I85cbaeb9c77e60bd1c68d928412f897de50c6329
Signed-off-by: Alexandru Gagniuc <mr.nuke.me@gmail.com>
NOTFORMERGE: Add tons of ACPI debug info

Change-Id: I2475ba04a5258f9d8af9b987a461ec2d5ab60135
NOTFORMERGE: Blatantly use ec code from google/parrot

Change-Id: I3e6466b09baee4612425bc4da7b325922a97fcf0