clk: qcom: clk-cpu-osm: Allow overriding CPU frequency tables in DT

Sometimes, it may be desirable to use CPU frequency tables different
from the ones in the hardware's OSM LUTs. This commit adds support for
overriding each CPU's frequency table with a list of allowed frequencies
defined in the OSM driver's DT node.

Signed-off-by: Danny Lin <danny@kdrag0n.dev>
Signed-off-by: Yaroslav Furman <yaro330@gmail.com>