lpm_levels: Do not allow power collapse when multi cores online

When any core power collapse is not selected, no need to allow
idle power collapse on cpu0 when multi cores online. It may leads to
stability issues.

CRs-fixed: 651076
Change-Id: I4c4eb4fb7d40e8bda78fa61358bcb0b00c4f6787
Signed-off-by: Anji Jonnala <anjir@codeaurora.org>