Convert CONFIG_SYS_I2C_MVTWSI to Kconfig

This converts the following to Kconfig:
   CONFIG_SYS_I2C_MVTWSI

Signed-off-by: Tom Rini <trini@konsulko.com>
diff --git a/configs/Auxtek-T003_defconfig b/configs/Auxtek-T003_defconfig
index 1ac80a1..8edb55e 100644
--- a/configs/Auxtek-T003_defconfig
+++ b/configs/Auxtek-T003_defconfig
@@ -9,6 +9,7 @@
 CONFIG_VIDEO_COMPOSITE=y
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
 CONFIG_SPL_I2C=y
+CONFIG_SYS_I2C_MVTWSI=y
 CONFIG_AXP152_POWER=y
 CONFIG_CONS_INDEX=2
 CONFIG_USB_EHCI_HCD=y