ARM: dts: fp5280g2: Enable KCS 3 for MCTP binding

Signed-off-by: George Liu <liuxiwei@inspur.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Link: https://lore.kernel.org/r/20210819055227.140980-1-liuxiwei@inspur.com


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