ia64: types: use <asm-generic/int-*.h> for the ia64 architecture

This modifies <asm-ia64/types.h> to use the <asm-generic/int-*.h>
generic include files.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
Acked-by: Tony Luck <tony.luck@intel.com>