Revert "Fix issue #94: do not touch sleeping hybrid radeon graphics"

This reverts commit 7d93b36e7f1f1250c5ab3c138ce2610541ec58b6.

Conflicts:

	debian/changelog
	debian/control
	tlp-functions
default: comment touch-up (solves issue #97).

Implement suggestions from Todd Partridge <toddrpartridge@gmail.com>
with some extensions and modifications.
RUNTIME_PM_DRIVER_BLACKLIST: exclude PCI(e) devices assigned to drivers
  Default is "radeon nvidia" (solves issue #94).
changelog.
Fix: nvidia --> nouveau.
Flush cache and wait more seconds before undocking drive bay
Check for firmware_node/status if bay is occupied

Dell Latitude BIOS/ACPI has bug which cause that docked attribute is always 0.
So check for firmware_node/status which is non zero when bay is occupied.
Note that on older kernels firmware_node/status is not available.
poweroff_drivebay(): show progress via "Powering off drive bay..." then "done."
Add support for intel pstate perf pct
Add support for enabling and disabling radio devices on AC and battery
Add support for disabling only those radio devices which are not in use
Show state of bluetooth and wifi devices if are in use