soc: aspeed: Add soc info driver

This adds a SOC_BUS info driver for the ASPEED platform.

The full ID table is preserved in this commit message in case someone
finds a need to change the implemntation in the future.

	{ "AST1100-A0", 0x00000200 },
	{ "AST1100-A1", 0x00000201 },
	{ "AST1100-A2", 0x00000202 },
	{ "AST1100-A3", 0x00000202 },

	{ "AST2050-A0", 0x00000200 },
	{ "AST2050-A1", 0x00000201 },
	{ "AST2050-A2", 0x00000202 },
	{ "AST2050-A3", 0x00000202 },

	{ "AST2100-A0", 0x00000300 },
	{ "AST2100-A1", 0x00000301 },
	{ "AST2100-A2", 0x00000302 },
	{ "AST2100-A3", 0x00000302 },

	{ "AST2150-A0", 0x00000202 },
	{ "AST2150-A1", 0x00000202 },

	{ "AST2200-A0", 0x00000102 },
	{ "AST2200-A1", 0x00000102 },

	{ "AST2300-A0", 0x01000003 },
	{ "AST2300-A1", 0x01010303 },

	{ "AST1300-A1", 0x01010003 },
	{ "AST1050-A1", 0x01010203 },

	{ "AST2400-A0", 0x02000303 },
	{ "AST2400-A1", 0x02010303 },
	{ "AST1400-A1", 0x02010103 },
	{ "AST1250-A1", 0x02010303 },

	{ "AST2500-A0", 0x04000303 },
	{ "AST2510-A0", 0x04000103 },
	{ "AST2520-A0", 0x04000203 },
	{ "AST2530-A0", 0x04000403 },
	{ "AST2500-A1", 0x04010303 },
	{ "AST2510-A1", 0x04010103 },
	{ "AST2520-A1", 0x04010203 },
	{ "AST2530-A1", 0x04010403 },
	{ "AST2500-A2", 0x04030303 },
	{ "AST2510-A2", 0x04030103 },
	{ "AST2520-A2", 0x04030203 },
	{ "AST2530-A2", 0x04030403 },

	{ "AST2600-A0", 0x05000303 },
	{ "AST2600-A1", 0x05010303 },
	{ "AST2600-A2", 0x05020303 },
	{ "AST2620-A1", 0x05010203 },
	{ "AST2620-A2", 0x05020203 },

Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Link: https://lore.kernel.org/r/20200921091644.133107-3-joel@jms.id.au


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