x86: Rename i386 to x86

Signed-off-by: Graeme Russ <graeme.russ@gmail.com>

arch/i386/include/asm/interrupt.h → arch/x86/include/asm/interrupt.h

@@ -29,10 +29,10 @@
 
 #include <asm/types.h>
 
-/* arch/i386/cpu/interrupts.c */
+/* arch/x86/cpu/interrupts.c */
 void set_vector(u8 intnum, void *routine);
 
-/* arch/i386/lib/interupts.c */
+/* arch/x86/lib/interupts.c */
 void disable_irq(int irq);
 void enable_irq(int irq);