apm821xx: add product names to the dt compatible for Meraki

Meraki choose to use their product's codename as the main
compatible string. Mathias Kresin commented that this is
a poor choice as this will confuse the users and devs once
the device-tree compatible is used for board-detection and
possible the image name.

Signed-off-by: Christian Lamparter <chunkeey@gmail.com>

target/linux/apm821xx/dts/MR24.dts

@@ -16,7 +16,7 @@
 
 / {
 	model = "Meraki MR24 Access Point";
-	compatible = "meraki,ikarem", "apm,bluestone";
+	compatible = "meraki,mr24", "meraki,ikarem", "apm,bluestone";
 
 	aliases {
 		serial0 = &UART1;

target/linux/apm821xx/dts/MX60.dts

@@ -16,7 +16,7 @@
 
 / {
 	model = "Meraki MX60/MX60W Security Appliance";
-	compatible = "meraki,buckminster", "apm,bluestone";
+	compatible = "meraki,mx60", "meraki,buckminster", "apm,bluestone";
 
 	aliases {
 		serial0 = &UART1;