Add Key Value Storage implementation for EFR32 platform.#4367

Merged

mspang merged 4 commits intoproject-chip:masterfrom rgoliver:kvs_efr

Jan 27, 2021

+2,092-143

Commits on Jan 15, 2021

Add pigweed logging backend for CHIP
Rob Oliver
committed
Update pigweed repo
Rob Oliver
committed

Commits on Jan 22, 2021

Add KVS implementation for EFR32 platform
Rob Oliver
committed

Commits on Jan 25, 2021

Add persistent storage test/example
Rob Oliver
committed