nouveau/headers: Add stub blackwell class headers

These just have the class define.  We'll replace them with the actual
headers from NVIDIA once we have them.

Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/34910>

src/nouveau/headers/class_parser.py

@@ -177,7 +177,7 @@ void
 P_DUMP_${nvcl}_MTHD_DATA(FILE *fp, uint16_t idx, uint32_t data,
                          const char *prefix)
 {
-    uint32_t parsed;
+    UNUSED uint32_t parsed;
     switch (idx) {
 %for mthd in methods:
   %if mthd.is_array and mthd.array_size == 0:

src/nouveau/headers/meson.build

@@ -28,6 +28,8 @@ nv_classes = [
   'clc797',
   'clc7c0',
   'clcbc0',
+  'clcdc0',
+  'clcec0',
 ]
 
 hwref_gens = [

src/nouveau/headers/nvidia/classes/clcd97.h

@@ -0,0 +1,6 @@
+#ifndef _cl_blackwell_a_h_
+#define _cl_blackwell_a_h_
+
+#define BLACKWELL_A 0xCD97
+
+#endif

src/nouveau/headers/nvidia/classes/clcdc0.h

@@ -0,0 +1,6 @@
+#ifndef _cl_blackwell_compute_a_h_
+#define _cl_blackwell_compute_a_h_
+
+#define BLACKWELL_COMPUTE_A 0xCDC0
+
+#endif /* _cl_blackwell_compute_a_h_ */

src/nouveau/headers/nvidia/classes/clce97.h

@@ -0,0 +1,6 @@
+#ifndef _cl_blackwell_b_h_
+#define _cl_blackwell_b_h_
+
+#define BLACKWELL_B 0xCE97
+
+#endif

src/nouveau/headers/nvidia/classes/clcec0.h

@@ -0,0 +1,6 @@
+#ifndef _cl_blackwell_compute_b_h_
+#define _cl_blackwell_compute_b_h_
+
+#define BLACKWELL_COMPUTE_B 0xCEC0
+
+#endif /* _cl_blackwell_compute_b_h_ */