sw64: make RO_DATA PAGE_SIZE aligned

Sunway inclusion
category: feature
bugzilla: https://gitee.com/openeuler/kernel/issues/I56OLG

--------------------------------
Signed-off-by: NMao Minkai <maominkai@wxiat.com>
Signed-off-by: NGu Zitao <guzitao@wxiat.com>

arch/sw_64/kernel/vmlinux.lds.S

@@ -33,7 +33,7 @@ SECTIONS
 	} :text
 	_etext = .;	/* End of text section */
 
-	RO_DATA(4096)
+	RO_DATA(PAGE_SIZE)
 
 	/* Will be freed after init */
 	__init_begin = ALIGN(PAGE_SIZE);