ARM: dts: aspeed: swift: Fix FSI GPIOs

Change the FSI clock and data GPIOs to match what the hardware turned
out to use.

Fixes: 8e8fd0cb ("ARM: dts: aspeed: Add Swift BMC machine")
Signed-off-by: Matt Spinler <spinler@us.ibm.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Reviewed-by: Adriana Kobylak <anoo@us.ibm.com>
Signed-off-by: Joel Stanley <joel@jms.id.au>