usb_dev: Do not erroneously return QIPROG_SUCCESS (Trivial)
usb_dev: Do not erroneously return QIPROG_SUCCESS (Trivial)

Do not return QIRPOG_SUCCES in the control request handler if
qiprog_get_capabilities returns an error.

Signed-off-by: Alexandru Gagniuc <cf8ce030f4bdd6ce49a1b687c7c3ccfa8b34ced2@gmail.com>

mrnuke/qiprog