[PATCH resend] spi: sc18is602: Support multiple devices on a single I2C bus if DT is configured

The driver currently only supports a single device per I2C bus since it uses the I2C bus number to set the SPI bus number. This makes it impossible to connect more than one chip to a single I2C bus. We don't want to use dynamic bus numbers unconditionally since this would result in every

[PATCH resend] spi: sc18is602: Support multiple devices on a single I2C bus if DT is configured

The driver currently only supports a single device per I2C bus since it uses the I2C bus number to set the SPI bus number. This makes it impossible to connect more than one chip to a single I2C bus. We don't want to use dynamic bus numbers unconditionally since this would result in every