Setting slew rate for each pin will grow with upcoming Qualcomm SoCs,Reviewed-by: Konrad Dybcio <konrad.dybcio@xxxxxxxxxx>
so split the code responsible for this into separate function for easier
readability and maintenance.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@xxxxxxxxxx>
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Changes in v2:
1. None
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