fix(led_strip): fix the reset time and resolution bugs (IEC-124)

[Kainarx]

This commit add a delay to ensure that the reset time is enough during the initialization. And remove the rigorous judgment of the real spi clk resolution to support different XTAL freq.

https://github.com/espressif/idf-extra-components/issues/340

Checklist

• [ ] Component contains License
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• [ ] Component contains idf_component.yml file with url field defined
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• [ ] CI passing