Hide hwaccess.h from public API

Move hwaccess.h #include from flash.h to individual drivers.
libflashrom users need flash.h, but they do not care about hwaccess.h
and should not see its definitions because they may conflict with
other hardware access functions and #defines used by the libflashrom
user.

Corresponding to flashrom svn r1549.

Signed-off-by: Patrick Georgi <patrick.georgi@secunet.com>
Acked-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
diff --git a/nicrealtek.c b/nicrealtek.c
index 32aa434..61e07d8 100644
--- a/nicrealtek.c
+++ b/nicrealtek.c
@@ -23,6 +23,7 @@
 #include <stdlib.h>
 #include "flash.h"
 #include "programmer.h"
+#include "hwaccess.h"
 
 #define PCI_VENDOR_ID_REALTEK	0x10ec
 #define PCI_VENDOR_ID_SMC1211	0x1113