mtd: do not include error.h

We do not use anything from it, and it is not available with all libcs.
Signed-off-by: Florian Fainelli <florian@openwrt.org>

SVN-Revision: 34294

package/mtd/src/mtd.c

@@ -31,7 +31,6 @@
 #include <sys/syscall.h>
 #include <fcntl.h>
 #include <errno.h>
-#include <error.h>
 #include <time.h>
 #include <string.h>
 #include <sys/ioctl.h>