crypto: stm32 - Rename module to use generic crypto

The complete stm32 module is rename as crypto
in order to use generic naming

Signed-off-by: Lionel Debieve <lionel.debieve@st.com>
Reviewed-by: Fabien Dessenne <fabien.dessenne@st.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>