Blackfin: bfin_spi: support gpios as chip selects

Rather than only support the pins dedicated as chip selects, utilize the
gpio framework to support any gpio pin.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/include/configs/bfin_adi_common.h b/include/configs/bfin_adi_common.h
index fa1e694..82daeb1 100644
--- a/include/configs/bfin_adi_common.h
+++ b/include/configs/bfin_adi_common.h
@@ -254,6 +254,7 @@
 /*
  * Misc Settings
  */
+#define CONFIG_BFIN_SPI_GPIO_CS /* Only matters if BFIN_SPI is enabled */
 #define CONFIG_LZMA
 
 #endif