JTAG: Move Target interface to separate header.

firmware/common/jtag.hpp

@@ -22,6 +22,8 @@
 #ifndef __JTAG_H__
 #define __JTAG_H__
 
+#include "jtag_target.hpp"
+
 #include <cstdint>
 #include <cstddef>
 
@@ -29,20 +31,6 @@
 
 namespace jtag {
 
-class Target {
-public:
-	using bit_t = uint_fast8_t;
-
-	virtual ~Target() {
-	}
-
-	virtual void delay(const size_t n) = 0;
-	virtual bit_t clock(
-		const bit_t tms_value,
-		const bit_t tdi_value
-	) = 0;
-};
-
 class JTAG {
 public:
 	constexpr JTAG(