ARM: dts: ste: minor whitespace cleanup around '='

The DTS code coding style expects exactly one space before and after '='
sign.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20231212-ux500-dts-v1-1-5a31b6742d85@linaro.orgSigned-off-by: Arnd Bergmann <arnd@arndb.de>