wic: Fix populating of IMAGE_EFI_BOOT_FILES with uefi-kernel

wic plugin crashed if IMAGE_EFI_BOOT_FILES is not empty and uefi-kernel
loader specified because of preliminary return from the function.
[Yocto #15033]
Fixes:
|   File "/mnt/builds/yocto/sources/scripts/lib/wic/plugins/source/bootimg-efi.py", line 371, in do_prepare_partition
|     for src_path, dst_path in cls.install_task:
|                               ^^^^^^^^^^^^^^^^
| AttributeError: type object 'BootimgEFIPlugin' has no attribute 'install_task'. Did you mean: 'do_install_disk'?

(From OE-Core rev: a6372f70f31b39ce9867b705d02205621d7a8685)

Signed-off-by: Pavel Zhukov <pavel@zhukoff.net>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

1 files changed, 1 insertions, 1 deletions

diff --git a/scripts/lib/wic/plugins/source/bootimg-efi.py b/scripts/lib/wic/plugins/source/bootimg-efi.py
index 4b00913a70..d6aeab2aad 100644
--- a/scripts/lib/wic/plugins/source/bootimg-efi.py
+++ b/scripts/lib/wic/plugins/source/bootimg-efi.py
@@ -221,7 +221,7 @@ class BootimgEFIPlugin(SourcePlugin):
             elif source_params['loader'] == 'systemd-boot':
                 cls.do_configure_systemdboot(hdddir, creator, cr_workdir, source_params)
             elif source_params['loader'] == 'uefi-kernel':
-                return
+                pass
             else:
                 raise WicError("unrecognized bootimg-efi loader: %s" % source_params['loader'])
         except KeyError: