drivers/s390/crypto/zcrypt_api.c: use seq_hex_dump() to dump buffers

Instead of custom approach let's use recently introduced seq_hex_dump()
helper.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Ingo Tuchscherer <ingo.tuchscherer@de.ibm.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: Joe Perches <joe@perches.com>
Cc: Tadeusz Struk <tadeusz.struk@intel.com>
Cc: Helge Deller <deller@gmx.de>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Vladimir Kondratiev <qca_vkondrat@qca.qualcomm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/s390/crypto/zcrypt_api.c

@@ -1206,16 +1206,8 @@ static void sprinthx(unsigned char *title, struct seq_file *m,
 static void sprinthx4(unsigned char *title, struct seq_file *m,
 		      unsigned int *array, unsigned int len)
 {
-	int r;
-
 	seq_printf(m, "\n%s\n", title);
-	for (r = 0; r < len; r++) {
-		if ((r % 8) == 0)
-			seq_printf(m, "    ");
-		seq_printf(m, "%08X ", array[r]);
-		if ((r % 8) == 7)
-			seq_putc(m, '\n');
-	}
+	seq_hex_dump(m, "    ", DUMP_PREFIX_NONE, 32, 4, array, len, false);
 	seq_putc(m, '\n');
 }