broadcom/compiler: add a definition for the unifa skip distance

We will be using this distance to setup another optimization in a
follow-up patch.

Reviewed-by: Alejandro Piñeiro <apinheiro@igalia.com>

x# Please enter the commit message for your changes. Lines starting

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10100>

src/broadcom/compiler/v3d_compiler.h

@@ -61,6 +61,13 @@
  */
 #define MAX_TMU_QUEUE_SIZE 8
 
+/**
+ * Maximum offset distance in bytes between two consecutive constant UBO loads
+ * for the same UBO where we would favor updating the unifa address by emitting
+ * dummy ldunifa instructions to avoid writing the unifa register.
+ */
+#define MAX_UNIFA_SKIP_DISTANCE 16
+
 struct nir_builder;
 
 struct v3d_fs_inputs {