armv8: ls1043a/ls1046aqds: fix the offsets of MTD partitions on NOR flash

Fix the offsets of MTD partitions on Nor flash on ls1043ardb,
ls1043aqds and ls1046aqds boards. Delete the rcw, uboot env and fman
partitions. Add user partitions for general usage.

Signed-off-by: Wenbin Song <wenbin.song@nxp.com>
Reviewed-by: York Sun <york.sun@nxp.com>