Retrieve the XTAL_K value in the parse_efuse() functions as it's
location various on a per device basis. For parts that do not provide
an XTAL_K value, skip setting it.
Signed-off-by: NJes Sorensen <Jes.Sorensen@redhat.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>