jtag: core: make local functions static

The functions:
- jtag_error_clear();
- jtag_tap_count();
are not referenced outside the file.

Make them static.

Change-Id: I00fcf06b1838b9f6c955c19772f1d41d486459e9
Signed-off-by: Antonio Borneo <borneo.antonio@gmail.com>
Reviewed-on: https://review.openocd.org/c/openocd/+/8542
Tested-by: jenkins

src/jtag/core.c

@@ -51,6 +51,8 @@ static void jtag_add_scan_check(struct jtag_tap *active,
 		tap_state_t state),
 		int in_num_fields, struct scan_field *in_fields, tap_state_t state);
 
+static int jtag_error_clear(void);
+
 /**
  * The jtag_error variable is set when an error occurs while executing
  * the queue.  Application code may set this using jtag_set_error(),
@@ -127,7 +129,11 @@ void jtag_set_error(int error)
 	jtag_error = error;
 }
 
-int jtag_error_clear(void)
+/**
+ * Resets jtag_error to ERROR_OK, returning its previous value.
+ * @returns The previous value of @c jtag_error.
+ */
+static int jtag_error_clear(void)
 {
 	int temp = jtag_error;
 	jtag_error = ERROR_OK;
@@ -186,7 +192,7 @@ struct jtag_tap *jtag_all_taps(void)
 	return __jtag_all_taps;
 };
 
-unsigned int jtag_tap_count(void)
+static unsigned int jtag_tap_count(void)
 {
 	struct jtag_tap *t = jtag_all_taps();
 	unsigned int n = 0;

src/jtag/jtag.h

@@ -153,7 +153,6 @@ struct jtag_tap *jtag_tap_by_jim_obj(Jim_Interp *interp, Jim_Obj *obj);
 struct jtag_tap *jtag_tap_by_position(unsigned int abs_position);
 struct jtag_tap *jtag_tap_next_enabled(struct jtag_tap *p);
 unsigned int jtag_tap_count_enabled(void);
-unsigned int jtag_tap_count(void);
 
 /*
  * - TRST_ASSERTED triggers two sets of callbacks, after operations to
@@ -568,11 +567,6 @@ void jtag_sleep(uint32_t us);
  * called with a non-zero error code.
  */
 void jtag_set_error(int error);
-/**
- * Resets jtag_error to ERROR_OK, returning its previous value.
- * @returns The previous value of @c jtag_error.
- */
-int jtag_error_clear(void);
 
 /**
  * Return true if it's safe for a background polling task to access the