crypto: inside-secure - add support for HMAC updates

This patch adds support for HMAC updates in the Inside Secure SafeXcel
crypto engine driver. Updates were supported for hash algorithms, but
were never enabled for HMAC ones. This fixes boot time test issues.

Signed-off-by: Antoine Tenart <antoine.tenart@bootlin.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>