etnaviv: drm: Suppress get-param error message for non-existent core

The -ENXIO return value isn't necessarily an error condition.
When iterating over cores, this signals that there are no more
cores to be found.

Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de>
Reviewed-by: Christian Gmeiner <cgmeiner@igalia.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28921>

src/etnaviv/drm/etnaviv_gpu.c

@@ -194,7 +194,9 @@ static uint64_t get_param(struct etna_device *dev, uint32_t core, uint32_t param
 
 	ret = drmCommandWriteRead(dev->fd, DRM_ETNAVIV_GET_PARAM, &req, sizeof(req));
 	if (ret) {
-		ERROR_MSG("get-param (%x) failed! %d (%s)", param, ret, strerror(errno));
+		if (ret != -ENXIO)
+			ERROR_MSG("get-param (%x) failed! %d (%s)", param, ret,
+				  strerror(errno));
 		return 0;
 	}