isaspec: decode: Make isa_decode_bitset(..) private

Fixes lto issues later in the series.

Signed-off-by: Christian Gmeiner <cgmeiner@igalia.com>
Reviewed-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/28176>

src/compiler/isaspec/isaspec_decode_decl.h

@@ -56,8 +56,6 @@ typedef uint64_t (*isa_expr_t)(struct decode_scope *scope);
  */
 uint64_t isa_decode_field(struct decode_scope *scope, const char *field_name);
 
-void isa_decode_bitset(void *out, const struct isa_bitset **bitsets, struct decode_scope *scope, bitmask_t val);
-
 /**
  * Used by generated decode functions
  */

src/compiler/isaspec/isaspec_decode_impl.c

@@ -933,7 +933,7 @@ decode_bitset(void *out, struct decode_scope *scope)
 	}
 }
 
-void
+static void
 isa_decode_bitset(void *out, const struct isa_bitset **bitsets, struct decode_scope *scope, bitmask_t val)
 {
 	struct decode_state *state = scope->state;