libblkid: ddf_raid: drop little-endian handling

libblkid: ddf_raid: drop little-endian handling

The DDF specification, both 1.2 and 2.0 require big-endian.
This is also what mdadm expects.

	5.2 Byte Ordering

	Each section of the DDF MUST be stored in big-endian format
	(i.e., the more significant bytes of the section are stored in
	lower addresses in relation to bytes of lesser significance).

Signed-off-by: Thomas Weißschuh <thomas@t-8ch.de>