[IA64] fix for SET_PERSONALITY when CONFIG_IA32_SUPPORT is not set.

Missed this when fixing the SET_PERSONALITY change.
Signed-off-by: Robin Holt <holt@sgi.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>

arch/ia64/kernel/process.c

@@ -721,11 +721,13 @@ flush_thread (void)
 	/* drop floating-point and debug-register state if it exists: */
 	current->thread.flags &= ~(IA64_THREAD_FPH_VALID | IA64_THREAD_DBG_VALID);
 	ia64_drop_fpu(current);
+#ifdef CONFIG_IA32_SUPPORT
 	if (IS_IA32_PROCESS(ia64_task_regs(current))) {
 		ia32_drop_partial_page_list(current);
 		current->thread.task_size = IA32_PAGE_OFFSET;
 		set_fs(USER_DS);
 	}
+#endif
 }
 
 /*