Add spdx

arch/x86_64/include/bits/cpu.h

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: ISC
+
 #pragma once
 
 static inline void arch_cpu_pause() {

arch/x86_64/include/bits/elf.h

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: ISC
+
 #pragma once
 
 #include <zinnia/elf.h>

arch/x86_64/include/bits/pmap.h

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: ISC
+
 #pragma once
 
 #include <stdint.h>

arch/x86_64/include/bits/sched.h

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: ISC
+
 #pragma once
 
 #include <zinnia/types.h>

arch/x86_64/include/bits/types.h

@@ -1,3 +1,5 @@
+// SPDX-License-Identifier: ISC
+
 #pragma once
 
 #include <stdint.h>