Move mutex and mem create/cleanup functions into mutex.c and mem.c respectively

kernel/proc/mem.c

@@ -1,9 +1,29 @@
 #include <libk/std.h>
+#include <mm/pmm.h>
 #include <proc/mem.h>
 #include <proc/proc.h>
 #include <proc/resource.h>
 #include <sync/spin_lock.h>
 
+bool proc_create_resource_mem (struct proc_resource_mem* mem, struct proc_resource_mem_init* init) {
+  if (init->pages == 0)
+    return false;
+
+  uintptr_t paddr = pmm_alloc (init->pages);
+  if (paddr == PMM_ALLOC_ERR)
+    return false;
+
+  mem->paddr = paddr;
+  mem->pages = mem->alive_pages = init->pages;
+
+  return true;
+}
+
+void proc_cleanup_resource_mem (struct proc* proc, struct proc_resource* resource) {
+  (void)proc;
+  pmm_free (resource->u.mem.paddr, resource->u.mem.pages);
+}
+
 void proc_mem_unref (struct proc* proc, struct proc_resource_mem* mem, size_t pages) {
   spin_lock_ctx_t ctxrs;