mm/vmalloc: use PAGE_ALIGNED() to check PAGE_SIZE alignment

We have PAGE_ALIGNED() in mm.h, so let's use it instead of IS_ALIGNED()
for checking PAGE_SIZE aligned case.
Signed-off-by: NShawn Lin <shawn.lin@rock-chips.com>
Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>

mm/vmalloc.c

@@ -1085,7 +1085,7 @@ void vm_unmap_ram(const void *mem, unsigned int count)
 	BUG_ON(!addr);
 	BUG_ON(addr < VMALLOC_START);
 	BUG_ON(addr > VMALLOC_END);
-	BUG_ON(!IS_ALIGNED(addr, PAGE_SIZE));
+	BUG_ON(!PAGE_ALIGNED(addr));
 
 	debug_check_no_locks_freed(mem, size);
 	vmap_debug_free_range(addr, addr+size);