staging: fbtft: Add space around '='

This patch fixes the checkpatch.pl error:

ERROR: spaces required around that '=' (ctx:VxV)
+                       sdev->bits_per_word=9;
                                           ^
Signed-off-by: NHelen Fornazier <helen.fornazier@gmail.com>
Signed-off-by: NGreg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/fbtft/flexfb.c

@@ -423,7 +423,7 @@ static int flexfb_probe_common(struct spi_device *sdev, struct platform_device *
 			}
 			par->fbtftops.write_register = fbtft_write_reg8_bus9;
 			par->fbtftops.write_vmem = fbtft_write_vmem16_bus9;
-			sdev->bits_per_word=9;
+			sdev->bits_per_word = 9;
 			ret = sdev->master->setup(sdev);
 			if (ret) {
 				dev_warn(dev,