imx_sdp: need to extend file size when header is added to end of file
imx_sdp: need to extend file size when header is added to end of file

Signed-off-by: Troy Kisky <debfc29e3a9e989b865b88f1f207951588bac6b3@boundarydevices.com>

boundarydevices/imx_usb_loader,bwalle/imx_usb_loader