crypto: qat - count QAT GEN4 errors

Add logic to count correctable, non fatal and fatal error for QAT GEN4
devices.
These counters are reported through sysfs attributes in the group
qat_ras.

Signed-off-by: Shashank Gupta <shashank.gupta@intel.com>
Reviewed-by: Giovanni Cabiddu <giovanni.cabiddu@intel.com>
Reviewed-by: Tero Kristo <tero.kristo@linux.intel.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>