[Bionic] UBUNTU: d-i: move ipr to storage-core-modules on ppc64el

[Seth Forshee]

On Tue, Apr 17, 2018 at 04:28:49PM -0300, Thadeu Lima de Souza Cascardo wrote:
> BugLink: https://bugs.launchpad.net/bugs/1751813
> 
> Drivers from scsi-modules are not included in the netinst initrd, while the
> ones in storage-core-modules are.
> 
> As the installer does not wait or enable synchronous scan on the scsi devices,
> if the driver is loaded late, the installer might not show all disks.
> 
> Though loading the driver earlier does not guarantee that all disks will be
> shown, it is more likely, which makes ppc64el users happier, as this is the
> most used controller on IBM Power Systems.
> 
> Moving the driver to storage-core-modules makes it included in the netinst
> initrd, which makes it load earlier, and users have reported that makes disks
> appear when the partitioning interface comes up.
> 
> Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo at canonical.com>

Applied to bionic/master-next and unstable/master, thanks!