spi: docs: drop driver owner initialization

Core in spi_register_driver() already sets the .owner, so driver
does not need to.
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://msgid.link/r/20240328203927.156184-1-krzysztof.kozlowski@linaro.orgSigned-off-by: Mark Brown <broonie@kernel.org>

Documentation/spi/spi-summary.rst

@@ -348,7 +348,6 @@ SPI protocol drivers somewhat resemble platform device drivers::
 	static struct spi_driver CHIP_driver = {
 		.driver = {
 			.name		= "CHIP",
-			.owner		= THIS_MODULE,
 			.pm		= &CHIP_pm_ops,
 		},