loader/efi: return error from efi_find_framebuffer

[vexeduxr]

Remove redundant initialization

[tsoome]

If you do not mind to do extra work, the function is supposed to return 0 or error code, could you replace the return(1) lines above with return (efi_status_to_errno(status)) or like:)

[vexeduxr]

Ah, I don't mind. :)

[vexeduxr]

Return actual errno values in other code paths.

[tsoome]

thanks!