capp: Disable fast-reboot whenever enable_capi_mode() is called

This patch updates phb4_set_capi_mode() to disable fast-reboot
whenever enable_capi_mode() is called, irrespective to its return
value. This should prevent against a possibility of not disabling
fast-reboot when some changes to enable_capi_mode() causing return of
an error and leaving CAPP in enabled mode.

Suggested-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Vaibhav Jain <vaibhav@linux.vnet.ibm.com>
Reviewed-by: Frederic Barrat <fbarrat@linux.vnet.ibm.com>
Signed-off-by: Stewart Smith <stewart@linux.vnet.ibm.com>

hw/phb4.c

@@ -4061,11 +4061,13 @@ static int64_t phb4_set_capi_mode(struct phb *phb, uint64_t mode,
 		ret = enable_capi_mode(p, pe_number, CAPI_DMA_TVT0,
 					CAPP_MAX_STQ_ENGINES |
 					CAPP_MIN_DMA_READ_ENGINES);
+		disable_fast_reboot("CAPP being enabled");
 		break;
 	case OPAL_PHB_CAPI_MODE_DMA_TVT1:
 		ret = enable_capi_mode(p, pe_number, CAPI_DMA_TVT1,
 					CAPP_MIN_STQ_ENGINES |
 					CAPP_MAX_DMA_READ_ENGINES);
+		disable_fast_reboot("CAPP being enabled");
 		break;
 	case OPAL_PHB_CAPI_MODE_SNOOP_ON:
 		/* nothing to do P9 if CAPP is alreay enabled */
@@ -4079,10 +4081,6 @@ static int64_t phb4_set_capi_mode(struct phb *phb, uint64_t mode,
 		ret = OPAL_UNSUPPORTED;
 	}
 
-	/* If CAPP enabled then disable fast-reboot for now */
-	if (ret == OPAL_SUCCESS)
-		disable_fast_reboot("CAPP being enabled");
-
 	return ret;
 }