ARM: dts: aspeed: everest: Add UCD90320 power sequencer

Add UCD90320 chip to Everest device tree.

Signed-off-by: Jim Wright <jlwright@us.ibm.com>
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Link: https://lore.kernel.org/r/20210329150020.13632-18-eajames@linux.ibm.com


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