aspeed/soc: Support RTC for AST2700

The RTC controller between AST2600 and AST2700 are identical. Add RTC model for
AST2700 RTC support. The RTC controller registers base address is start at
0x12C0_F000 and its alarm interrupt is connected to GICINT13.

Signed-off-by: Jamin Lin <jamin_lin@aspeedtech.com>
Reviewed-by: Cédric Le Goater <clg@redhat.com>
1 file changed