pan/bi: Add w0 to the 'h01' swizzle bucket

A number of instructions, such as LOAD.i8, use this swizzle in the XML.

Reviewed-by: Alyssa Rosenzweig <alyssa.rosenzweig@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/8358>

src/panfrost/bifrost/bi_packer.c.py

@@ -89,7 +89,7 @@ def pack_modifier(mod, width, default, opts, body, pack_exprs):
     # Swizzles need to be packed "specially"
     SWIZZLE_BUCKETS = [
             set(['h00', 'h0']),
-            set(['h01', 'none', 'b0123']), # Identity
+            set(['h01', 'none', 'b0123', 'w0']), # Identity
             set(['h10']),
             set(['h11', 'h1']),
             set(['b0000', 'b00', 'b0']),