ARM: dts: aspeed: Rainier: Fix PCA9552 on bus 8

The second presence detection PCA9552 was incorrectly added to bus 9.

Fixes: 8be44de6 ("ARM: dts: aspeed: Rainier: Add presence GPIOs")
Signed-off-by: Eddie James <eajames@linux.ibm.com>
Reviewed-by: Joel Stanley <joel@jms.id.au>
Signed-off-by: Joel Stanley <joel@jms.id.au>