vfio/pci: Fix typo in macro to declare accessors

Correct spelling of DECLA[RA]TION

Suggested-by: Ramesh Thomas <ramesh.thomas@intel.com>
Signed-off-by: Gerd Bayer <gbayer@linux.ibm.com>
Link: https://lore.kernel.org/r/20240619115847.1344875-4-gbayer@linux.ibm.com


Signed-off-by: Alex Williamson <alex.williamson@redhat.com>