UFS spec version 2.1 was published more than 10 years ago. It is
vanishingly unlikely that even there are out there platforms that uses
earlier host controllers, let alone that those ancient platforms will
ever run a V6.10 kernel. To be extra cautious, leave out removal of
UFSHCI 2.0 support from this patch, and just remove support of host
controllers prior to UFS2.0.