r8152: Rename RTL8152_UNPLUG to RTL8152_INACCESSIBLE

[ Upstream commit 715f67f3 ]

Whenever the RTL8152_UNPLUG is set that just tells the driver that all
accesses will fail and we should just immediately bail. A future patch
will use this same concept at a time when the driver hasn't actually
been unplugged but is about to be reset. Rename the flag in
preparation for the future patch.

This is a no-op change and just a search and replace.

Signed-off-by: Douglas Anderson <dianders@chromium.org>
Reviewed-by: Grant Grundler <grundler@chromium.org>
Signed-off-by: David S. Miller <davem@davemloft.net>
Stable-dep-of: 32a574c7 ("r8152: Add RTL8152_INACCESSIBLE checks to more loops")
Signed-off-by: Sasha Levin <sashal@kernel.org>