Updated gem5/SConscript to compile power_func.cpp
Updated gem5/SConscript to compile power_func.cpp

Change-Id: I8e1b32be36bb1279bd4ef9c8a45fe38cf28c7528

giosalv/526-aladdin,giosalv/526-aladdin,giosalv/526-aladdin,giosalv/526-aladdin