mfd: tqmx86: Remove incorrect TQMx90UC board ID

[ Upstream commit 16b2ad15 ]

No TQMx90UC exists at the moment, and it is undecided whether ID 10 will
be used eventually (and if it is, how that SoM will be named).

Signed-off-by: Matthias Schiffer <matthias.schiffer@ew.tq-group.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Stable-dep-of: 051c69ff ("mfd: tqmx86: Specify IO port register range more precisely")
Signed-off-by: Sasha Levin <sashal@kernel.org>