iommu/apple-dart: Fix spelling mistake "grups" -> "groups"

There is a spelling mistake in a dev_err message. Fix it.

Signed-off-by: Colin Ian King <colin.i.king@gmail.com>
Link: https://lore.kernel.org/r/20231209231240.4056082-1-colin.i.king@gmail.com


Signed-off-by: Joerg Roedel <jroedel@suse.de>