[console] Add concept of generic console configuration

Signed-off-by: Michael Brown <mcb30@ipxe.org>

src/core/init.c

@@ -20,6 +20,7 @@
 FILE_LICENCE ( GPL2_OR_LATER );
 
 #include <ipxe/device.h>
+#include <ipxe/console.h>
 #include <ipxe/init.h>
 
 /** @file
@@ -95,5 +96,8 @@ void shutdown ( int flags ) {
 			startup_fn->shutdown ( flags );
 	}
 
+	/* Reset console */
+	console_reset();
+
 	started = 0;
 }