Split x86 specific functions out of util.c/h to new files x86.c/h.

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
diff --git a/src/fw/paravirt.c b/src/fw/paravirt.c
index b1dd8b0..a68e3a1 100644
--- a/src/fw/paravirt.c
+++ b/src/fw/paravirt.c
@@ -20,6 +20,7 @@
 #include "mptable.h" // mptable_setup
 #include "hw/pci.h" // create_pirtable
 #include "xen.h" // xen_biostable_setup
+#include "x86.h" // cpuid
 
 // Amount of continuous ram under 4Gig
 u32 RamSize;