ot1200: fix sf detection

Commit 155fa9af95ac5be857a7327e7a968a296e60d4c8 changed the way
to define a GPIO line, which can be used to force CS high
across multiple transactions. In order to fix sf detection
change board code to make use of board_spi_cs_gpio(..).

Signed-off-by: Christian Gmeiner <christian.gmeiner@gmail.com>
Acked-by: Stefano Babic <sbabic@denx.de>
Acked-by: Nikita Kiryanov <nikita@compulab.co.il>
diff --git a/include/configs/ot1200.h b/include/configs/ot1200.h
index 071880f..d7696bd 100644
--- a/include/configs/ot1200.h
+++ b/include/configs/ot1200.h
@@ -47,7 +47,7 @@
 #define CONFIG_SPI_FLASH_SST
 #define CONFIG_MXC_SPI
 #define CONFIG_SF_DEFAULT_BUS  2
-#define CONFIG_SF_DEFAULT_CS   (0|(IMX_GPIO_NR(1, 3)<<8))
+#define CONFIG_SF_DEFAULT_CS   0
 #define CONFIG_SF_DEFAULT_SPEED 25000000
 #define CONFIG_SF_DEFAULT_MODE (SPI_MODE_0)