ARM: dts: aspeed: everest: Add I2C switch on bus 8

The switch controls two busses containing some VRMs.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20211020215321.33960-4-eajames@linux.ibm.com


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