ARM: dts: aspeed: rainier 4U: Fix fan configuration

The 4U fans didn't have the correct properties since the fan nodes
were redefined. Fix this by referencing each fan individually and
adding the differences to the 4U fans.

Signed-off-by: Eddie James <eajames@linux.ibm.com>
Link: https://lore.kernel.org/r/20210329150020.13632-12-eajames@linux.ibm.com


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