[PATCH] spi: microchip-core: fix passing zero to PTR_ERR warning

[Mark Brown]

On Wed, Jun 15, 2022 at 12:30:22PM +0100, Conor Dooley wrote:

> -		ret = PTR_ERR(spi->clk);
> +		ret = !spi->clk ? -ENXIO : PTR_ERR(spi->clk);

I think you're looking for PTR_ERR_OR_ZERO() here?
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