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/tqma6.h b/include/configs/tqma6.h
index 14d7730..cb5f7fc 100644
--- a/include/configs/tqma6.h
+++ b/include/configs/tqma6.h
@@ -28,7 +28,7 @@
 #define TQMA6_SPI_FLASH_SECTOR_SIZE	SZ_64K
 
 /* I2C Configs */
-#define CONFIG_I2C_MULTI_BUS
+#define CFG_I2C_MULTI_BUS
 
 #if !defined(CONFIG_DM_PMIC)
 #define CONFIG_POWER_PFUZE100_I2C_ADDR	0x08