util: Use vma_entry_len helper

Signed-off-by: Cyrill Gorcunov <gorcunov@gmail.com>

util.c

@@ -178,7 +178,7 @@ void printk_vma(struct vma_area *vma_area)
 	printk("s: %16lx e: %16lx l: %4liK p: %4x f: %8x pg: %8lx "
 	       "fd: %4d pid: %4d dev:%02x:%02x:%08lx vf: %s st: %s spc: %s\n",
 	       vma_area->vma.start, vma_area->vma.end,
-	       (vma_area->vma.end - vma_area->vma.start) >> 10,
+	       vma_entry_len(&vma_area->vma) >> 10,
 	       vma_area->vma.prot,
 	       vma_area->vma.flags,
 	       vma_area->vma.pgoff,