tuna: PowerHAL: Define constants for CPUfreq paths

Same CPUfreq paths are used many times in the code.
This patch defines constants for them.

Cherry-picked and adjusted for tuna from
http://omapzoom.org/?p=device/ti/blaze_tablet.git;a=commit;h=f5ee7ba155978bd9e547c079b521a1a249bdefab

Change-Id: I07519ad70a2f243c6fe68b26dc8b409e6223772e

Conflicts:
	power/power_tuna.c
tuna: commonize what we can (1/4)

board-info.txt, bluetooth device name, ro.bq.gpu_to_cpu_unsupported.

Change-Id: I151ba8a7bd0c9b2a0ccf23fc97935bd63702047d

Conflicts:
	BoardConfig.mk
tuna: recovery updates

Change-Id: I5ea8b27b29398ddad3b2def403fb6f967ef3fd69

Conflicts:
	BoardConfig.mk
Fix liblight build.

Due to kernel headers not being included in the build path anymore (or being there at all actually), they need to be added on a per-section basis I guess?

liblight needs (at least...) linux/leds-an30259a.h
audio: Fix aliasing violation.
tuna: remove outdated prebuilt kernel, setup inline kernel building

Change-Id: Idc3fc360843e29f488ee9dc79f44041a6b69a34a

Conflicts:
	device.mk