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 inline void debugt(const char *func, const char *msg)
{
	if (DP->flags & DEBUGT)
		pr_info("%s:%s dtime=%lu\n", func, msg, jiffies - debugtimer);
}

static inline void debugt(const char *func, const char *msg)
{
	if (DP->flags & DEBUGT)
		pr_info("%s:%s dtime=%lu\n", func, msg, jiffies - debugtimer);
}
