cleanup/SPEAr: Define configuration flags more elegantly

In SPEAr, some of the configuration flags eg. CONFIG_SPEAR_EMI, were given value
"1", which isn't required. Define the flags without assigning any value

Signed-off-by: Amit Virdi <amit.virdi@st.com>
Acked-by: Stefan Roese <sr@denx.de>
Signed-off-by: Stefan Roese <sr@denx.de>
diff --git a/include/configs/spear6xx_evb.h b/include/configs/spear6xx_evb.h
index 4a76134..31b8725 100644
--- a/include/configs/spear6xx_evb.h
+++ b/include/configs/spear6xx_evb.h
@@ -28,7 +28,7 @@
  * High Level Configuration Options
  * (easy to change)
  */
-#define CONFIG_SPEAR600				1
+#define CONFIG_SPEAR600
 
 #if defined(CONFIG_usbtty)
 #define CONFIG_SPEAR_USBTTY