ARM: dts: aspeed: p10bmc: Add power control pins

Add to p10bmc systems the GPIO line names used in chassis power on / off
control and chassis power good monitoring. Names used are as documented at [1].

[1] https://github.com/openbmc/docs/blob/master/designs/device-tree-gpio-naming.md



Signed-off-by: Jim Wright <jlwright@us.ibm.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Link: https://lore.kernel.org/r/20210816160002.18645-1-jlwright@us.ibm.com


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