implement io based udelay function for all mainboards that lack an apic

timer (or just failed otherwise due to missing udelay)


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@2131 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

src/pc80/udelay_io.c

@@ -0,0 +1,9 @@
+#include <arch/io.h>
+
+void udelay(int usecs)
+{
+	int i;
+	for(i = 0; i < usecs; i++)
+		outb(i&0xff, 0x80);
+}
+