ARM: omap2plus_defconfig: enable SPI GPIO

GTA04 uses that for controlling the td028ttec1 panel. So
for easier testing/bisecting it is useful to have it
enabled in the defconfig.
Signed-off-by: Andreas Kemnade <andreas@kemnade.info>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/configs/omap2plus_defconfig

@@ -280,6 +280,7 @@ CONFIG_SERIAL_OMAP_CONSOLE=y
 CONFIG_SERIAL_DEV_BUS=y
 CONFIG_I2C_CHARDEV=y
 CONFIG_SPI=y
+CONFIG_SPI_GPIO=m
 CONFIG_SPI_OMAP24XX=y
 CONFIG_SPI_TI_QSPI=m
 CONFIG_HSI=m