More helpful debug output. (#374)

I often want to see what OpenOCD is telling gdb, and it's annoying to
have to recompile.

Change-Id: Icce07606f253d67e2523cf2732dbe5042c6e483e

src/target/riscv/program.c

@@ -30,7 +30,7 @@ int riscv_program_init(struct riscv_program *p, struct target *target)
 int riscv_program_write(struct riscv_program *program)
 {
 	for (unsigned i = 0; i < program->instruction_count; ++i) {
-		LOG_DEBUG("%p: debug_buffer[%02x] = DASM(0x%08x)", program, i, program->debug_buffer[i]);
+		LOG_DEBUG("debug_buffer[%02x] = DASM(0x%08x)", i, program->debug_buffer[i]);
 		if (riscv_write_debug_buffer(program->target, i,
 					program->debug_buffer[i]) != ERROR_OK)
 			return ERROR_FAIL;