Added:
NV backup writing for:

P8 lite ALE-L21,ALE-L23
Honor 6X BLN-AL10
Honor 5A CAM-L21
Honor 4X Che2-L11,Che2-UL00
Honor 4C CHM-U01
Mate S CRR-UL00
P9 EVA-AL10,EVA-TL00
Honor 8 FRD-AL00,FRD-AL10
P8 GRA-UL00
Honor V8 KNT-AL10,KNT-AL20,KNT-UL10
Honor 5C NEM-AL10
Mate 8 NXT-AL10
Honor 6Plus PE-TL10
Honor 7 PLK-UL00
P9 plus VIE-AL10
P9 lite VNS-L31