Revert "regular.mk: gnustep is broken on x86_64 right now"

This reverts commit d160d6100eee5aff419d9a196bdb84d9a6c5af1c:
GNUstep reportedly works on x86_64 now.

Conflicts:
	conf.d/regular.mk
stage2: preload ahci before udev/propagator

This change tries to force loading the storage driver
for cases when SecureBoot is "helping" the chainloader
to fail, see #29705 for details collected so far.

Of course ahci.ko only does AHCI but that's every storage
controller I've seen on UEFI/SecureBoot systems so far.
1.1.22-alt1

- ahci kludge (see #29705) :(
gear-store-tags