arm64: pageattr: Correctly adjust unaligned start addresses

The start address needs to be actually updated after it
is detected to be unaligned. Adjust it and the end address
properly.
Reported-by: Zi Shen Lim <zlim.lnx@gmail.com>
Reviewed-by: Zi Shen Lim <zlim.lnx@gmail.com>
Signed-off-by: Laura Abbott <lauraa@codeaurora.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>

arch/arm64/mm/pageattr.c

@@ -46,7 +46,8 @@ static int change_memory_common(unsigned long addr, int numpages,
 	struct page_change_data data;
 
 	if (!IS_ALIGNED(addr, PAGE_SIZE)) {
-		addr &= PAGE_MASK;
+		start &= PAGE_MASK;
+		end = start + size;
 		WARN_ON_ONCE(1);
 	}