crypto: atmel-aes - Fix 3-page memory leak in atmel_aes_buff_cleanup

crypto: atmel-aes - Fix 3-page memory leak in atmel_aes_buff_cleanup

atmel_aes_buff_init() allocates 4 pages using __get_free_pages() with
ATMEL_AES_BUFFER_ORDER, but atmel_aes_buff_cleanup() frees only the
first page using free_page(), leaking the remaining 3 pages. Use
free_pages() with ATMEL_AES_BUFFER_ORDER to fix the memory leak.

Fixes: bbe628ed897d ("crypto: atmel-aes - improve performances of data transfer")
Cc: stable@vger.kernel.org
Signed-off-by: Thorsten Blum <thorsten.blum@linux.dev>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>