Move top level pc80 directory to drivers/

There is no reason for this to be a top level directory.
Some stuff from lib/ should also be moved to drivers/

Change-Id: I3c2d2e127f7215eadead029cfc7442c22b26814a
Signed-off-by: Stefan Reinauer <reinauer@google.com>
Reviewed-on: http://review.coreboot.org/939
Tested-by: build bot (Jenkins)
Reviewed-by: Ronald G. Minnich <rminnich@gmail.com>

src/include/pc80/mc146818rtc.h

@@ -135,7 +135,7 @@ static inline int get_option(void *dest __attribute__((unused)),
 #define read_option_lowlevel(start, size, def) def
 #endif
 #else
-#include <pc80/mc146818rtc_early.c>
+#include <drivers/pc80/mc146818rtc_early.c>
 #endif
 #define read_option(name, default) read_option_lowlevel(CMOS_VSTART_ ##name, CMOS_VLEN_ ##name, (default))