qcacld-3.0: Add string for page fault wake up reason

Add string for page fault wake up reason such that wake up
reason is logged properly.

Change-Id: I0f7138f730f5b9ca66f1d524d5d1868a99ccd88f
CRs-Fixed: 2471522

core/wma/src/wma_features.c

@@ -1574,6 +1574,8 @@ static const uint8_t *wma_wow_wake_reason_str(A_INT32 wake_reason)
 	case WOW_REASON_WLAN_BL:
 		return "MOTION_DETECT_BASELINE";
 #endif /* WLAN_FEATURE_MOTION_DETECTION */
+	case WOW_REASON_PAGE_FAULT:
+		return "PAGE_FAULT";
 	default:
 		return "unknown";
 	}