gpio: max7301: Reverting "Do not force SPI speed when using OF Platform"

This patch reverts commit 047b93a35961f7a6561e6f5dcb040738f822b892 which breaks
MAX7301 GPIO driver because that commit was dependant on a rejected patch that
was implementing selection of SPI speed from the Device Tree.

Signed-off-by: Christophe Leroy <[e-mail]>
Acked-by: Roland Stigge <[e-mail]>
Signed-off-by: Linus Walleij <[e-mail]>

drivers/gpio/gpio-max7301.c

···
 	int ret;
 
 	/* bits_per_word cannot be configured in platform data */
-	if (spi->dev.platform_data)
-		spi->bits_per_word = 16;
+	spi->bits_per_word = 16;
 	ret = spi_setup(spi);
 	if (ret < 0)
 		return ret;