[POWERPC] holly.c: Remove unnecessary include of linux/ide.h

There's nothing in holly.c that needs linux/ide.h, just remove it from
the list of includes.

Signed-off-by: Olof Johansson <olof@lixom.net>
Acked-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>