floppy: don't write kernel-only members to FDRAWCMD ioctl output

Do not leak kernel-only floppy_raw_cmd structure members to userspace.
This includes the linked-list pointer and the pointer to the allocated
DMA space.

Signed-off-by: Matthew Daley <mattd@bugfuzz.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
static int floppy_resume(struct device *dev)
{
	int fdc;

	for (fdc = 0; fdc < N_FDC; fdc++)
		if (FDCS->address != -1)
			user_reset_fdc(-1, FD_RESET_ALWAYS, false);

	return 0;
}

static int floppy_resume(struct device *dev)
{
	int fdc;

	for (fdc = 0; fdc < N_FDC; fdc++)
		if (FDCS->address != -1)
			user_reset_fdc(-1, FD_RESET_ALWAYS, false);

	return 0;
}
