ARM: dts: Add Facebook BMC 128MB flash layout

This is the layout used by Facebook BMC systems. It describes the fixed
flash layout of a 128MB mtd device.

Signed-off-by: Tao Ren <rentao.bupt@gmail.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20210805222818.8391-2-rentao.bupt@gmail.com


Signed-off-by: Joel Stanley <joel@jms.id.au>