global: Migrate CONFIG_I2C_MULTI_BUS to CFG

Perform a simple rename of CONFIG_I2C_MULTI_BUS to CFG_I2C_MULTI_BUS

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/include/configs/omap3_beagle.h b/include/configs/omap3_beagle.h
index efeb7bf..af7cb35 100644
--- a/include/configs/omap3_beagle.h
+++ b/include/configs/omap3_beagle.h
@@ -29,7 +29,7 @@
 #endif /* CONFIG_MTD_RAW_NAND */
 
 /* Enable Multi Bus support for I2C */
-#define CONFIG_I2C_MULTI_BUS
+#define CFG_I2C_MULTI_BUS
 
 /* DSS Support */