mkcloud: reduce ksm on aarch64 even further
mkcloud: reduce ksm on aarch64 even further

The setting on aarch64 workers is completely insane, it basically causes
the cpu to completely stall, triggering lock up detection:

[ 9563.821445] INFO: rcu_sched self-detected stall on CPU
[ 9563.821452]  40-...: (114019 ticks this GP)
idle=f45/140000000000001/0 softirq=382572/382585 fqs=112564
[ 9563.821457]   (t=114023 jiffies g=138434 c=138433 q=393704)
[ 9563.821459] Task dump for CPU 40:
[ 9563.821462] ksmd            R  running task        0   293      2
0x00000002

vmoravec/automation,SUSE-Cloud/automation,SUSE-Cloud/automation,gosipyan/automation,vmoravec/automation,SUSE-Cloud/automation,gosipyan/automation,aspiers/automation,aspiers/automation,gosipyan/automation,vmoravec/automation,aspiers/automation,SUSE-Cloud/automation,gosipyan/automation,aspiers/automation,vmoravec/automation