[kernel][ports] Add basic ports functionality

kernel/init.c

Index: kernel/init.c
diff --git a/kernel/init.c b/kernel/init.c
index 557266c84f56c7fe74422e464bf1158dc1c44e2a..8bc4f3f991eb6687faafcfd3bc98cad893e26f98 100644
--- a/kernel/init.c
+++ b/kernel/init.c
@@ -26,6 +26,7 @@
 #include <kernel/thread.h>
 #include <kernel/timer.h>
 #include <kernel/mp.h>
+#include <kernel/port.h>
 
 void kernel_init(void)
 {
@@ -43,5 +44,9 @@ void kernel_init(void)
 	// initialize kernel timers
 	dprintf(SPEW, "initializing timers\n");
 	timer_init();
+
+	// initialize ports
+	dprintf(SPEW, "initializing ports\n");
+	port_init();
 }