ia64: Use libata instead of the legacy ide driver in defconfigs

Switch the ia64 defconfigs to use the modern libata driver instead of
the soon to be removed legacy ide driver.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Signed-off-by: Tony Luck <tony.luck@intel.com>
Link: https://lore.kernel.org/r/20200911094936.1175688-1-hch@lst.de