cpufreq: blacklist Arm Vexpress platforms in cpufreq-dt-platdev

stable inclusion
from stable-5.10.27
commit 9443aef16fca8071032e702e1386d5c40a4a0832
bugzilla: 51493

--------------------------------

[ Upstream commit fbb31cb8 ]

Add "arm,vexpress" to cpufreq-dt-platdev blacklist since the actual
scaling is handled by the firmware cpufreq drivers(scpi, scmi and
vexpress-spc).

Signed-off-by: Sudeep Holla <sudeep.holla@arm.com>
Signed-off-by: Viresh Kumar <viresh.kumar@linaro.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Chen Jun <chenjun102@huawei.com>
Acked-by:   Weilong Chen <chenweilong@huawei.com>
Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com>