crypto: amlogic - Remove redundant assignment and error messages

In the function meson_crypto_probe, devm_platform_ioremap_resource()
have already contains error message, so remove the
redundant assignment and error messages.

Signed-off-by: Tang Bin <tangbin@cmss.chinamobile.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>