Erasing is not supported by the hardware, it can be written directly.
Tested on CY8CKIT-059, except modifying-write.
Change-Id: I6e920ed930dcd5c7f0b10c5b1b4791a828d9080a
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Tomas Vanek <vanekt@fbl.cz>
Reviewed-on: http://openocd.zylin.com/3434
Tested-by: jenkins