crypto: img-hash - Remove redundant dev_err call in img_hash_probe()

devm_platform_ioremap_resource() and devm_ioremap_resource()
will print err msg while failing, so the redundant dev_err call
can be removed.

Signed-off-by: YueHaibing <yuehaibing@huawei.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>