pwr.py: relax checks when uncore sysfs not available

min max checks cannot be performed when there is no uncore driver
available as there is no initial min/max value to compare against.
Just validate against what's writable to the MSRs.

Signed-off-by: David Hunt <[email protected]>

tag after bugfix in sst_bf.py

add tag for latest sst_bf.py

pwr: version 0.2.1

Signed-off-by: Anatoly Burakov <[email protected]>

pwr: prevent setuptools from generating an egg/zip file

Currently, when pwr library is installed from its source directory
using the python setuptools infrastructure, it is installed as an
.egg file by default. This is OK for running, but makes it harder to
debug the library when using applications. Since Python debugger doesn't
appear to allow loading source reference paths, use this workaround to
ease the pain of debugging the library.

Signed-off-by: Anatoly Burakov <[email protected]>

Updated to clarify options in the script.

pwr: create a proper installable library

Signed-off-by: Anatoly Burakov <[email protected]>