libpayload: Support functions for Geode

The Geode video driver will require a number of support functions,
including udelay(), PCI bus walking and MSRs.  This adds those functions
in preparation for the actual code.

Signed-off-by: Jordan Crouse <jordan.crouse@amd.com>
Acked-by: Uwe Hermann <uwe@hermann-uwe.de>


git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3231 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1

payloads/libpayload/i386/timer.c

@@ -77,6 +77,11 @@ void ndelay(unsigned int n)
 	_delay(n * cpu_khz / 1000000);
 }
 
+void udelay(unsigned int n)
+{
+	_delay(n * cpu_khz / 1000);
+}
+
 void mdelay(unsigned int m)
 {
 	_delay(m * cpu_khz);