ARM: configs: replace CONFIG_NO_HZ=y with CONFIG_NO_HZ_IDLE=y

According to https://www.kernel.org/doc/html/latest/timers/no_hz.html

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CONFIG_NO_HZ=y should be replaced by CONFIG_NO_HZ_IDLE=y for newer
kernels, so let's reflect that in the 32-bit ARM defconfigs.

Signed-off-by: Stefan Hansson <newbie13xd@gmail.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> # Samsung
Acked-by: Jernej Skrabec <jernej.skrabec@gmail.com>
Link: https://lore.kernel.org/r/20220825162034.5901-1-newbie13xd@gmail.com

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Signed-off-by: Arnd Bergmann <arnd@arndb.de>