crypto: ccp - cache capability into psp device

The results of the capability register will be used by future
code at runtime rather than just initialization.

Acked-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Mario Limonciello <mario.limonciello@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>