riscv64: page size is 4096, reported by sorear

libc/sysdeps/linux/riscv64/bits/uClibc_page.h

@@ -21,7 +21,7 @@
 #define _UCLIBC_PAGE_H
 
 /* PAGE_SHIFT determines the page size -- in this case 4096 */
-#define PAGE_SHIFT	13
+#define PAGE_SHIFT	12
 #define PAGE_SIZE	(1UL << PAGE_SHIFT)
 #define PAGE_MASK	(~(PAGE_SIZE-1))