fix(atapi): fix int size in atapi_drive struct

k/atapi.h

@@ -2,13 +2,15 @@
 #define ATAPI_H
 
 #include <stdint.h>
+#include <stddef.h>
 
 struct atapi_drive
 {
-    uint8_t reg;
-    uint8_t drive;
+    uint16_t reg;
+    uint16_t drive;
 };
 
 void discover_atapi_drive(void);
+void *read_block(size_t lba);
 
 #endif /* !ATAPI_H */