package/cryptodev: properly declare providers

package/cryptodev: properly declare providers

cryptodev-linux and ocf-linux are providers of the cryptodev virtual
package, so they must declare themselves as such.

We do not have any problem for now, as the only consumer (openssl) of
both cryptodev-linux and ocf-linux did not depend on the virtual package
but on each provider. The other consumer is gnutls, but has only a
dependency on cryptodev-linux.

However, openssl can be turned into a proper consumer of the virtual
package, which would trigger the bug.

For the sake of correctness, make both cryptodev-linux and ocf-linux
declare themselves as providers for the cryptodev virtual package.

Signed-off-by: "Yann E. MORIN" <yann.morin.1998@free.fr>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>