Always enable AHCI even if currently IDE disk mode

I had quite the experience trying to change IDE disk mode in BIOS to AHCI.

After trying to update initramfs I some how lost the rockstor web ui (maybe related to removing a drive?).

I eventually had to reinstall Rockstor.

It seems many distros now always include AHCI support so it is a non issue if the interface type is changed from IDE to AHCI. But not Rockstor.

Please consider including AHCI support regardless of current disk mode.