libperfmgr: Update nodes in 2 passes

Some nodes have dependency in each other: e.g cpufreq min/max

Test: libperfmgr_test pass

(cherry picked from commit de49c055503f86d27753a6d8691124c1e0c2d451)

Change-Id: I007937484f3f21df856bdbd76a00a4e89ba5c768
3 files changed