m68k: Disable Amiga serial console support if modular

If CONFIG_AMIGA_BUILTIN_SERIAL=m, I get the following warnings:

| drivers/char/amiserial.c: At top level:
| drivers/char/amiserial.c:2138: warning: data definition has no type or storage class
| drivers/char/amiserial.c:2138: warning: type defaults to 'int' in declaration of 'console_initcall'
| drivers/char/amiserial.c:2138: warning: parameter names (without types) in function declaration
| drivers/char/amiserial.c:2134: warning: 'amiserial_console_init' defined but not used

because console_initcall() is not defined (nor really sensible) in the
modular case.

So disable serial console support if the driver is modular.
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/char/amiserial.c

@@ -2071,12 +2071,13 @@ module_init(rs_init)
 module_exit(rs_exit)
 
 
+#if defined(CONFIG_SERIAL_CONSOLE) && !defined(MODULE)
+
 /*
  * ------------------------------------------------------------
  * Serial console driver
  * ------------------------------------------------------------
  */
-#ifdef CONFIG_SERIAL_CONSOLE
 
 static void amiga_serial_putc(char c)
 {
@@ -2130,6 +2131,7 @@ static int __init amiserial_console_init(void)
 	return 0;
 }
 console_initcall(amiserial_console_init);
-#endif
+
+#endif /* CONFIG_SERIAL_CONSOLE && !MODULE */
 
 MODULE_LICENSE("GPL");