amd/ac: update fallthrough comments

Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/7747>

src/amd/common/ac_debug.c

@@ -33,6 +33,7 @@
 
 #include "sid.h"
 #include "sid_tables.h"
+#include "util/compiler.h"
 #include "util/memstream.h"
 #include "util/u_math.h"
 #include "util/u_memory.h"
@@ -511,7 +512,7 @@ static void ac_do_parse_ib(FILE *f, struct ac_ib_parser *ib)
             fprintf(f, COLOR_GREEN "NOP (type 2)" COLOR_RESET "\n");
             break;
          }
-         /* fall through */
+         FALLTHROUGH;
       default:
          fprintf(f, "Unknown packet type %i\n", type);
          break;

src/amd/common/ac_rtld.c

@@ -25,6 +25,7 @@
 
 #include "ac_binary.h"
 #include "ac_gpu_info.h"
+#include "util/compiler.h"
 #include "util/u_dynarray.h"
 #include "util/u_math.h"
 
@@ -687,6 +688,7 @@ static bool apply_relocs(const struct ac_rtld_upload_info *u, unsigned part_idx,
       switch (r_type) {
       case R_AMDGPU_ABS32:
          assert((uint32_t)abs == abs);
+         FALLTHROUGH;
       case R_AMDGPU_ABS32_LO:
          *(uint32_t *)dst_ptr = util_cpu_to_le32(abs);
          break;
@@ -698,6 +700,7 @@ static bool apply_relocs(const struct ac_rtld_upload_info *u, unsigned part_idx,
          break;
       case R_AMDGPU_REL32:
          assert((int64_t)(int32_t)(abs - va) == (int64_t)(abs - va));
+         FALLTHROUGH;
       case R_AMDGPU_REL32_LO:
          *(uint32_t *)dst_ptr = util_cpu_to_le32(abs - va);
          break;