ARM: dts: aspeed: minerva: add i/o expanders on each FCB

Add four I/O expanders on each i2c of fan control board (FCB), assign the
GPIO line name to each GPIO in use, and specify the interrupt GPIO number
for each FCB's i/o expander.

Signed-off-by: Yang Chen <[email protected]>
Link: https://patch.msgid.link/[email protected]
Signed-off-by: Andrew Jeffery <[email protected]>

Author: Quanta-YangChen