ARM: dts: aspeed: Add Delta AHE-50DC BMC

This is a 1U Open19 power shelf with six PSUs and 50 12VDC outputs via
LM25066 efuses.  It's managed by a pair of AST1250 BMCs in a redundant
active/active configuration using a PCA9541 on each I2C bus to
arbitrate access between the two.

Signed-off-by: Zev Weiss <zev@bewilderbeest.net>
Link: https://lore.kernel.org/r/20221108001551.18175-3-zev@bewilderbeest.net


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