ARM: dts: aspeed: greatlakes: Add gpio names

Add GPIO names for SOC lines.

Signed-off-by: Delphine CC Chiu <Delphine_CC_Chiu@wiwynn.com>
Link: https://lore.kernel.org/r/20230329083235.24123-2-Delphine_CC_Chiu@Wiwynn.com


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