crypto: caam - add missing put_device() call

The of_find_device_by_node() takes a reference to the underlying device
structure, we should release that reference.

Fixes: 35af6403 ("crypto: caam - Check for CAAM block presence before registering with crypto layer")
Fixes: b189817c ("crypto: caam/qi - add ablkcipher and authenc algorithms")
Reviewed-by: Horia Geantă <horia.geanta@nxp.com>
Signed-off-by: Wen Yang <yellowriver2010@hotmail.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>