Coverity report for EFI subsystem

[Ilias Apalodimas]

Hi Tom,

Heinirch forwarded me a coverity report a few days ago regarding some
changes in the EFI subsystem and specifically the protocol management
functions.

The issues reported were:
- CID 376213
- CID 376206
- CID 376203
- CID 376200
- CID 376199
- CID 376195

The last one has been already fixed here [0] and you should get a pull
request soon.  The rest should be marked as false positives.  We are
initializing the va_args outside the reported functions and I think
coverity gets confused.  If someone thinks otherwise please shout

[0] https://source.denx.de/u-boot/custodians/u-boot-efi/-/commit/1c1c275363242c81442e0eba523d532dbe03ac45
Regards
/Ilias