[IA64] unexport fpswa.h

fpswa.h is not relevant for userspace,
so do not export it.
Signed-off-by: NSam Ravnborg <sam@ravnborg.org>
Signed-off-by: NTony Luck <tony.luck@intel.com>

arch/ia64/include/asm/Kbuild

@@ -2,7 +2,6 @@ include include/asm-generic/Kbuild.asm
 
 header-y += break.h
 header-y += fpu.h
-header-y += fpswa.h
 header-y += ia64regs.h
 header-y += intel_intrin.h
 header-y += perfmon_default_smpl.h