freedreno: Increase the NUM_UNIT on compute's consts in indirect dispatch.

Avoids tripping the assert in the next commit -- the blob never uses
num_unit % 4 != 0 for indirect const uploads.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5990>
diff --git a/src/gallium/drivers/freedreno/ir3/ir3_const.h b/src/gallium/drivers/freedreno/ir3/ir3_const.h
index f840e5e..5e79661 100644
--- a/src/gallium/drivers/freedreno/ir3/ir3_const.h
+++ b/src/gallium/drivers/freedreno/ir3/ir3_const.h
@@ -611,7 +611,7 @@
 				indirect_offset = info->indirect_offset;
 			}
 
-			emit_const_prsc(ring, v, offset * 4, indirect_offset, 4, indirect);
+			emit_const_prsc(ring, v, offset * 4, indirect_offset, 16, indirect);
 
 			pipe_resource_reference(&indirect, NULL);
 		} else {