[IA64] Use standard macros for page-aligned data.

Signed-off-by: Nelson Elhage <nelhage@ksplice.com>
Signed-off-by: Tony Luck <tony.luck@intel.com>
diff --git a/arch/ia64/kernel/head.S b/arch/ia64/kernel/head.S
index 12305d3..1a6e445 100644
--- a/arch/ia64/kernel/head.S
+++ b/arch/ia64/kernel/head.S
@@ -167,7 +167,7 @@
 	mov _tmp2=((ia64_rid(IA64_REGION_ID_KERNEL, (num<<61)) << 8) | (pgsize << 2) | vhpt);; \
 	mov rr[_tmp1]=_tmp2
 
-	.section __special_page_section,"ax"
+	__PAGE_ALIGNED_DATA
 
 	.global empty_zero_page
 empty_zero_page: