s390/zcrypt: zcrypt device driver cleanup

Some cleanup in the s390 zcrypt device driver:
- Removed fragments of pcixx crypto card code. This code
  can't be reached anymore because the hardware detection
  function does not recognize crypto cards < CEX2 since
  commit f56545430736 ("s390/zcrypt: Introduce QACT support
  for AP bus devices.")
- Rename of some files and driver names which where still
  reflecting pcixx support to cex2a/cex2c.
- Removed all the zcrypt version strings in the file headers.
  There is only one place left - the zcrypt.h header file is
  now the only place for zcrypt device driver version info.
- Zcrypt version pump up from 2.2.0 to 2.2.1.

Signed-off-by: Harald Freudenberger <freude@linux.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

drivers/s390/crypto/zcrypt_cex2a.h

@@ -1,7 +1,5 @@
 /* SPDX-License-Identifier: GPL-2.0+ */
 /*
- *  zcrypt 2.1.0
- *
  *  Copyright IBM Corp. 2001, 2006
  *  Author(s): Robert Burroughs
  *	       Eric Rossman (edrossma@us.ibm.com)
@@ -14,7 +12,7 @@
 #define _ZCRYPT_CEX2A_H_
 
 /**
- * The type 50 message family is associated with a CEX2A card.
+ * The type 50 message family is associated with CEXxA cards.
  *
  * The four members of the family are described below.
  *
@@ -111,7 +109,7 @@ struct type50_crb3_msg {
 } __packed;
 
 /**
- * The type 80 response family is associated with a CEX2A card.
+ * The type 80 response family is associated with a CEXxA cards.
  *
  * Note that all unsigned char arrays are right-justified and left-padded
  * with zeroes.