check-sr-results.yaml: fix uefi_dump min entries

Fix the minimum number of files we expect under `uefi_dump'.

There are 11 mandatory files there:

  bcfg.log
  devices.log
  devtree.log
  dh.log
  dmem.log
  dmpstore.log
  drivers.log
  ifconfig.log
  memmap.log
  pci.log
  uefi_version.log

There are also two optional files:

  map.log
  smbiosview.log

This means `uefi_dump' should have 11..13 files.

It seems that the optional `smbios.log' was not taken into account in
commit df4cb663 ("check-sr-results: adapt for ir 2.0").

See also #41.

[Backport commit 8671dfff.]
Signed-off-by: Vincent Stehlé <vincent.stehle@arm.com>