spi: dw: Drop GPIO header

The DW driver does not use the legacy GPIO header so drop
it from the spi-dw.h include.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20191030073418.23717-1-linus.walleij@linaro.orgSigned-off-by: Mark Brown <broonie@kernel.org>

drivers/spi/spi-dw.h

@@ -4,7 +4,6 @@
 
 #include <linux/io.h>
 #include <linux/scatterlist.h>
-#include <linux/gpio.h>
 
 /* Register offsets */
 #define DW_SPI_CTRL0			0x00