Only one fb-terminal-based putchar_()

kernel/term/term.c

@@ -3,7 +3,6 @@
 #include "spinlock/spinlock.h"
 #include "bootinfo/bootinfo.h"
 #include "term.h"
-#include "putchar.h"
 #include "fm-t-437.f16.h"
 
 Term TERM;
@@ -48,9 +47,7 @@ void term_write_unsafe(const char *s, size_t len) {
   flanterm_write(TERM.ftctx, s, len);
 }
 
-#if PUTCHAR_ == PUTCHAR_FB
-  // For printf library
-  void putchar_(char c) {
-    term_write_unsafe(&c, 1);
-  }
-#endif
+// For printf library
+void putchar_(char c) {
+  term_write_unsafe(&c, 1);
+}