Remove old header file and add more missing header files

sdcard.h

@@ -0,0 +1,12 @@
+/* sdcard.h */
+
+#ifndef __SDCARD_H
+#define __SDCARD_H
+
+#include "types.h"
+
+bool init_sdcard(void);
+bool sdcard_read(unsigned int address, char *buffer, unsigned int length);
+void sdcard_poll(void);
+
+#endif /* __SDCARD_H */