x86/efi: Delete misleading efi_printk() error message

x86/efi: Delete misleading efi_printk() error message

A number of people are reporting seeing the "setup_efi_pci() failed!"
error message in what used to be a quiet boot,

  https://bugzilla.kernel.org/show_bug.cgi?id=81891

The message isn't all that helpful because setup_efi_pci() can return a
non-success error code for a variety of reasons, not all of them fatal.

Let's drop the return code from setup_efi_pci*() altogether, since
there's no way to process it in any meaningful way outside of the inner
__setup_efi_pci*() functions.

Reported-by: Darren Hart <[email protected]>
Reported-by: Josh Boyer <[email protected]>
Cc: Ulf Winkelvos <[email protected]>
Cc: Andre Müller <[email protected]>
Cc: Ingo Molnar <[email protected]>
Cc: Linus Torvalds <[email protected]>
Signed-off-by: Matt Fleming <[email protected]>