REAL_POS_IO enable by default in nvmutil

(for real pwrite/pread. don't use the compatibility
one - it works perfectly, but using it is pointless
and may have unknown bugs, even though i know it's
probably perfect)

Signed-off-by: Leah Rowe <leah@libreboot.org>

util/libreboot-utils/include/common.h

@@ -83,7 +83,7 @@ int fchmod(int fd, mode_t mode);
 #endif
 
 #ifndef REAL_POS_IO
-#define REAL_POS_IO 0
+#define REAL_POS_IO 1
 #endif
 
 #ifndef LOOP_EAGAIN