crypto: aspeed - Use devm_platform_ioremap_resource()

Convert platform_get_resource(), devm_ioremap_resource() to a single
call to Use devm_platform_ioremap_resource(), as this is exactly
what this function does.

Signed-off-by: Yang Li <yang.lee@linux.alibaba.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>