fix building when asm/page.h is not available

http://bugs.gentoo.org/168278

--- disk-utils/fsck.cramfs.c
+++ disk-utils/fsck.cramfs.c
@@ -76,7 +76,9 @@
 
 #define PAD_SIZE 512
 
+#ifdef HAVE_asm_page_h
 #include <asm/page.h>
+#endif
 #ifdef PAGE_SIZE
 #define PAGE_CACHE_SIZE ((int) PAGE_SIZE)
 #elif defined __ia64__