move spinlock.h

the implementation is more arch specific than anything. it has been placed under arch/include

src/arch/x86_64/include/arch/spinlock.h

@@ -1,8 +1,6 @@
 #ifndef _SPINLOCK_H_INCLUDE
 #define _SPINLOCK_H_INCLUDE
 
-// TODO rewrite this in a more arch independent way
-
 static inline void spinlock_acquire(int *lock){
 	while(!__sync_bool_compare_and_swap(lock, 0, 1)) asm("pause");
 }

src/sys/mm/pmm.c

@@ -3,7 +3,7 @@
 #include <limine.h>
 #include <stdio.h>
 #include <string.h>
-#include <kernel/spinlock.h>
+#include <arch/spinlock.h>
 
 #define PAGE_SIZE 4096
 

src/sys/mm/vmm.c

@@ -2,7 +2,7 @@
 #include <kernel/pmm.h>
 #include <arch/panic.h>
 #include <string.h>
-#include <kernel/spinlock.h>
+#include <arch/spinlock.h>
 #include <stdio.h>
 #include <stdbool.h>
 #include <limine.h>