crypto: inside-secure - Add CRYPTO_CHACHA20POLY1305 to CRYPTO_DEV_SAFEXCEL

Due to the addition of Chacha20-Poly1305 support to the inside-secure
driver, it now depends on CRYPTO_CHACHA20POLY1305. Added reference.

changes since v1:
- added missing dependency to crypto/Kconfig

changes since v2:
- nothing

changes since v3:
- nothing

Signed-off-by: Pascal van Leeuwen <pvanleeuwen@verimatrix.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>