ide: <asm-sparc/ide_64.h>: use __raw_{read,write}w()

Use __raw_{read,write}w() in __ide_{in,out}sw()
and remove no longer needed {in,out}w_be().

Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Signed-off-by: David S. Miller <davem@davemloft.net>