virtio/rng: Zero-initialize the device

Use calloc() to avoid uninitialized fields in the rng device.

Signed-off-by: Jean-Philippe Brucker <jean-philippe@linaro.org>
Link: https://lore.kernel.org/r/20220722141731.64039-5-jean-philippe@linaro.org
Signed-off-by: Will Deacon <will@kernel.org>
1 file changed