ARM: dts: aspeed: swift: Change power supplies to version 2

Swift power supplies are version 2 of the IBM CFFPS.

Fixes: 8e8fd0cb

 ("ARM: dts: aspeed: Add Swift BMC machine")
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>