arm64: dts: qcom: sm6375: correct sleep clock frequency

arm64: dts: qcom: sm6375: correct sleep clock frequency

The SM6375 platform uses PM6125 to provide sleep clock. According to the
documentation, that clock has 32.7645 kHz frequency. Correct the sleep
clock definition.

Fixes: 59d34ca97f91 ("arm64: dts: qcom: Add initial device tree for SM6375")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Link: https://lore.kernel.org/r/20241224-fix-board-clocks-v3-12-e9b08fbeadd3@linaro.org
Signed-off-by: Bjorn Andersson <andersson@kernel.org>