crypto: ccp - Fix dereferencing uninitialized error pointer

Fix below smatch warnings:
drivers/crypto/ccp/sev-dev.c:1312 __sev_platform_init_locked()
error: we previously assumed 'error' could be null

Fixes: 9770b428 ("crypto: ccp - Move dev_info/err messages for SEV/SNP init and shutdown")
Reported-by: Dan Carpenter <dan.carpenter@linaro.org>
Closes: https://lore.kernel.org/r/202505071746.eWOx5QgC-lkp@intel.com/


Signed-off-by: Ashish Kalra <ashish.kalra@amd.com>
Reviewed-by: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>