dt-bindings: aspeed-lpc: Add AST2600 compatible strings

The AST2600 datasheet indicates the same register set behind the LPC
controller address space.

Signed-off-by: Brad Bishop <bradleyb@fuzziesquirrel.com>
Reviewed-by: Andrew Jeffery <andrew@aj.id.au>
Link: https://lore.kernel.org/r/20190925125610.12096-2-bradleyb@fuzziesquirrel.com
Signed-off-by: Joel Stanley <joel@jms.id.au>

Documentation/devicetree/bindings/mfd/aspeed-lpc.txt

@@ -46,6 +46,7 @@ Required properties
 - compatible:	One of:
 		"aspeed,ast2400-lpc", "simple-mfd"
 		"aspeed,ast2500-lpc", "simple-mfd"
+		"aspeed,ast2600-lpc", "simple-mfd"
 
 - reg:		contains the physical address and length values of the Aspeed
                 LPC memory region.
@@ -64,6 +65,7 @@ BMC Node
 - compatible:	One of:
 		"aspeed,ast2400-lpc-bmc"
 		"aspeed,ast2500-lpc-bmc"
+		"aspeed,ast2600-lpc-bmc"
 
 - reg:		contains the physical address and length values of the
                 H8S/2168-compatible LPC controller memory region
@@ -74,6 +76,7 @@ Host Node
 - compatible:   One of:
 		"aspeed,ast2400-lpc-host", "simple-mfd", "syscon"
 		"aspeed,ast2500-lpc-host", "simple-mfd", "syscon"
+		"aspeed,ast2600-lpc-host", "simple-mfd", "syscon"
 
 - reg:		contains the address and length values of the host-related
                 register space for the Aspeed LPC controller
@@ -128,6 +131,7 @@ Required properties:
 - compatible:	One of:
 		"aspeed,ast2400-lpc-ctrl";
 		"aspeed,ast2500-lpc-ctrl";
+		"aspeed,ast2600-lpc-ctrl";
 
 - reg:		contains offset/length values of the host interface controller
 		memory regions
@@ -168,6 +172,7 @@ Required properties:
 - compatible:	One of:
 		"aspeed,ast2400-lhc";
 		"aspeed,ast2500-lhc";
+		"aspeed,ast2600-lhc";
 
 - reg:		contains offset/length values of the LHC memory regions. In the
 		AST2400 and AST2500 there are two regions.
@@ -187,7 +192,8 @@ state of the LPC bus. Some systems may chose to modify this configuration.
 
 Required properties:
 
- - compatible:		"aspeed,ast2500-lpc-reset" or
+ - compatible:		"aspeed,ast2600-lpc-reset" or
+			"aspeed,ast2500-lpc-reset"
 			"aspeed,ast2400-lpc-reset"
  - reg:			offset and length of the IP in the LHC memory region
  - #reset-controller	indicates the number of reset cells expected