npu2-opencapi: reduce number of retries to train the link

We've been reliably training the opencapi link on the first attempt
for quite a while. Furthermore, if it doesn't train on the first
attempt, retries haven't been that useful. So let's reduce the number
of attempts we do to train the link.

2 retries = 3 attempts to train.

Each (failed) training sequence costs about 3 seconds.

Signed-off-by: Frederic Barrat <fbarrat@linux.ibm.com>
Acked-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.ibm.com>

hw/npu2-opencapi.c

@@ -78,7 +78,7 @@
 #define   OCAPI_SLOT_FRESET_DEASSERT_DELAY  (OCAPI_SLOT_FRESET + 4)
 #define   OCAPI_SLOT_FRESET_INIT_DELAY      (OCAPI_SLOT_FRESET + 5)
 
-#define OCAPI_LINK_TRAINING_RETRIES	5
+#define OCAPI_LINK_TRAINING_RETRIES	2
 #define OCAPI_LINK_TRAINING_TIMEOUT	3000 /* ms */
 #define OCAPI_LINK_STATE_TRAINED        0x7