Revert "rules: ubi mtd - add link to named partitions"
This reverts commit 7f1e9c806b6915e8020cf3706dc87e1cd37bc2fa, PR #6750
Apparently the rule change never worked, see #20071.
Fixes #20071
(cherry picked from commit 4b6bc397)
(cherry picked from commit 7e558b50)
(cherry picked from commit 897f14bf)