Remove the Power Management ('pm') parameters from the sample launch scripts,
and update the comments, At most one VM is allowed to use "--pm_notify_channel uart"
at a time, since only one socket connection to SOS life_mngr is allowed.
Remove it by default and allow user to add on demand
rt_industry_ubuntu.rst
enable_s5.rst
Signed-off-by: li shuang <shuangx.li@intel.com>