[v5.15 Regression] block: rename GENHD_FL_NO_PART_SCAN to GENHD_FL_NO_PART

Hi Christoph,

A kernel bug report was opened against Ubuntu [0].  This bug is a regression introduced in mainline version v5.17-rc1 and made it's way into v5.15 stable updates.

The following commit was identified as the cause of the regression in 5.15:

c6ce1c5dd327 ("block: rename GENHD_FL_NO_PART_SCAN to GENHD_FL_NO_PART")

I was hoping to get your feedback, since you are the patch author. Is the best approach to revert this commit, since many third parties rely on the name being GENHD_FL_NO_PART_SCAN in kernel headers?  Is there a specific need that you know of that requires this commit in the 5.15 and earlier stable kernels?

Thanks,

Joe

[0] http://pad.lv/2053101