ac: consistently use ifndef guards over pragma once

Signed-off-by: Emil Velikov <emil.l.velikov@gmail.com>
Reviewed-by: Marek Olšák <marek.olsak@amd.com>
Acked-by: Vedran Miletić <vedran@miletic.net>
Acked-by: Juha-Pekka Heikkila <juhapekka.heikkila@gmail.com>
Reviewed-by: Edward O'Callaghan <funfunctor@folklore1984.net>

src/amd/common/ac_binary.h

@@ -24,7 +24,8 @@
  *
  */
 
-#pragma once
+#ifndef AC_BINARY_H
+#define AC_BINARY_H
 
 #include <stdint.h>
 #include <stdbool.h>
@@ -97,3 +98,5 @@ void ac_shader_binary_read_config(struct ac_shader_binary *binary,
 				  struct ac_shader_config *conf,
 				  unsigned symbol_offset,
 				  bool supports_spill);
+
+#endif /* AC_BINARY_H */

src/amd/common/ac_llvm_util.h

@@ -22,7 +22,9 @@
  * of the Software.
  *
  */
-#pragma once
+
+#ifndef AC_LLVM_UTIL_H
+#define AC_LLVM_UTIL_H
 
 #include <stdbool.h>
 #include <llvm-c/TargetMachine.h>
@@ -65,3 +67,5 @@ void ac_dump_module(LLVMModuleRef module);
 #ifdef __cplusplus
 }
 #endif
+
+#endif /* AC_LLVM_UTIL_H */

src/amd/common/ac_nir_to_llvm.h

@@ -21,7 +21,8 @@
  * IN THE SOFTWARE.
  */
 
-#pragma once
+#ifndef AC_NIR_TO_LLVM_H
+#define AC_NIR_TO_LLVM_H
 
 #include <stdbool.h>
 #include "llvm-c/Core.h"
@@ -157,3 +158,4 @@ void ac_create_gs_copy_shader(LLVMTargetMachineRef tm,
 			      const struct ac_nir_compiler_options *options,
 			      bool dump_shader);
 
+#endif /* AC_NIR_TO_LLVM_H */