capp: Fix the capp recovery timeout comparison

The current capp recovery timeout control loop in
do_capp_recovery_scoms() uses a wrong comparison for return value of
tb_compare(). This may cause do_capp_recovery_scoms() to report an
timeout earlier than the 168ms stipulated time.

The patch fixes this by updating the loop timeout control branch in
do_capp_recovery_scoms() to use the correct enum tb_cmpval.

Cc: Stable #6.0+
Fixes: 09b853c("capi: Poll Err/Status register during CAPP
recovery")
Reported-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Vaibhav Jain <vaibhav@linux.ibm.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Reviewed-by: Christophe Lombard <clombard@linux.vnet.ibm.com>
Reviewed-by: Andrew Donnellan <andrew.donnellan@au1.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.ibm.com>

hw/phb4.c

@@ -3034,7 +3034,7 @@ static int do_capp_recovery_scoms(struct phb4 *p)
 		time_wait_ms(5);
 		xscom_read(p->chip_id, CAPP_ERR_STATUS_CTRL + offset, &reg);
 
-		if (end && tb_compare(mftb(), end) != TB_AAFTERB) {
+		if (tb_compare(mftb(), end) != TB_ABEFOREB) {
 			PHBERR(p, "CAPP: Capp recovery Timed-out.\n");
 			end = 0;
 			break;