image.bbclass: do not check size of the debugfs image

The debugfs is supposed to be used in addition to the
normal image for debugging purposes, it doesn't make
sense to artificially limit its maximum size.

(From OE-Core rev: 7cdf3b2444df8cd322d9eff1bdbdc5adddcaf22a)

Signed-off-by: André Draszik <git@andred.net>
Signed-off-by: Ross Burton <ross.burton@intel.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/classes/image.bbclass

@@ -537,6 +537,12 @@ def get_rootfs_size(d):
     base_size += rootfs_alignment - 1
     base_size -= base_size % rootfs_alignment
 
+    # Do not check image size of the debugfs image. This is not supposed
+    # to be deployed, etc. so it doesn't make sense to limit the size
+    # of the debug.
+    if (d.getVar('IMAGE_BUILDING_DEBUGFS', True) or "") == "true":
+        return base_size
+
     # Check the rootfs size against IMAGE_ROOTFS_MAXSIZE (if set)
     if rootfs_maxsize:
         rootfs_maxsize_int = int(rootfs_maxsize)