firmware-utils: mkfwimage: add support for Ubiquiti SW devices

This commit adds support for Ubiquiti ToughSwitch XP (and probably also
EdgeSwitch XP) devices. They are mostly based on the same hardware as
MX devices.

Signed-off-by: Tobias Schramm <tobleminer@gmail.com>

tools/firmware-utils/src/mkfwimage.c

@@ -110,6 +110,15 @@ struct fw_info fw_info[] = {
 		},
 		.sign = false,
 	},
+	{
+		.name = "SW",
+		.fw_layout = {
+			.kern_start	=	0x9f050000,
+			.kern_entry	=	0x80002000,
+			.firmware_max_length=	0x00760000,
+		},
+		.sign = false,
+	},
 	{
 		.name = "UBDEV01",
 		.fw_layout = {