[MIPS] Fix the fix for divide by zero error in build_{clear,copy}_page

Signed-off-by: NRalf Baechle <ralf@linux-mips.org>

arch/mips/mm/page.c

@@ -460,7 +460,7 @@ void __cpuinit build_copy_page(void)
 		build_copy_load_pref(&buf, -off);
 		off -= cache_line_size;
 	}
-	off = cache_line_size ? min(8, pref_bias_copy_load / cache_line_size) *
+	off = cache_line_size ? min(8, pref_bias_copy_store / cache_line_size) *
 	                        cache_line_size : 0;
 	while (off) {
 		build_copy_store_pref(&buf, -off);