bdk: add missing header guards

bdk/mem/heap.c

@@ -1,6 +1,6 @@
 /*
  * Copyright (c) 2018 naehrwert
- * Copyright (c) 2018-2025 CTCaer
+ * Copyright (c) 2018-2026 CTCaer
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms and conditions of the GNU General Public License,

bdk/mem/smmu.h

@@ -15,10 +15,13 @@
  * along with this program.  If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <assert.h>
-
 #include <utils/types.h>
 
+#ifndef _SMMU_H_
+#define _SMMU_H_
+
+#include <assert.h>
+
 #define MC_SMMU_AVPC_ASID            0x23C
 #define MC_SMMU_TSEC_ASID            0x294
 
@@ -70,3 +73,5 @@ void  smmu_deinit_domain(u32 dev_base, u32 asid);
 void  smmu_domain_bypass(u32 dev_base, bool bypass);
 void  smmu_map(void *ptb, u32 iova, u64 iopa, u32 pages, u32 attr);
 void  smmu_map_huge(void *ptb, u32 iova, u64 iopa, u32 regions, u32 attr);
+
+#endif