feat: refactor to use gcc types

kernel/drivers/keyboard.c

@@ -5,7 +5,6 @@
 
 #include <drivers/ports.h>
 #include <cpu/isr.h>
-#include <libc/stdbool.h>
 #include <libc/ringqueue.h>
 #include <mem/mem.h>
 #include <libk.h>
@@ -26,10 +25,10 @@ const char scancode_map_uppercase[] = {
 };
 
 struct {
-    u8 shift: 1;
-    u8 ctrl: 1;
-    u8 alt: 1;
-    u8 extended: 1;
+    uint8_t shift: 1;
+    uint8_t ctrl: 1;
+    uint8_t alt: 1;
+    uint8_t extended: 1;
 } keyboard_state;
 
 void *keyboard_event_buffer = NULL;