kernel-fit-image: Exclude from world

Recipes using this class are designed to be pulled in by dependencies and
the recipe doesn't build unless the kernel is appropriately configured. Mark
as not suitable for world builds as a result to avoid world build failures.

(From OE-Core rev: fc4834a8deae27579897d86d82c6f2335636a092)

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes-recipe/kernel-fit-image.bbclass

@@ -7,6 +7,9 @@ UNPACKDIR = "${S}"
 
 PACKAGE_ARCH = "${MACHINE_ARCH}"
 
+# This bbclass requires KERNEL_CLASSES += "kernel-fit-extra-artifacts"
+EXCLUDE_FROM_WORLD = "1"
+
 DEPENDS += "\
     u-boot-tools-native dtc-native \
     ${@'kernel-signing-keys-native' if d.getVar('FIT_GENERATE_KEYS') == '1' else ''} \