Fixes

- switch to volatile everywhere
 - use myusec_delay instead of usleep

Corresponding to coreboot v1 svn r492.

Makefile

@@ -3,9 +3,7 @@ CC = gcc -O2
 
 all: ${OBJS}
 	${CC} -o flash_rom flash_rom.c ${OBJS}
-	${CC} -o flash_on flash_on.c
-	${CC} -o acpi_reset acpi_reset.c
-	${CC} -o acpi_shutdown acpi_shutdown.c
+#	${CC} -o flash_on flash_on.c
 
 clean:
-	rm -f flash_rom flash_on acpi_reset acpi_shutdown *.o *~
+	rm -f flash_rom flash_on *.o *~