Store device structs in a dynamic list

ulib/_premain.c

@@ -2,13 +2,11 @@
 #include <stddef.h>
 #include <system/system.h>
 #include <sysdefs/processctl.h>
-#include <sysdefs/devctl.h>
 #include <errors.h>
 #include <uprintf.h>
 #include <log.h>
 #include <util/util.h>
 #include <umalloc/umalloc.h>
-#include <devids.h>
 
 extern void main(void);
 extern uint8_t _bss_start[];