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-T004_defconfig b/configs/Auxtek-T004_defconfig
index d1a1de7..9c4922e 100644
--- a/configs/Auxtek-T004_defconfig
+++ b/configs/Auxtek-T004_defconfig
@@ -7,6 +7,7 @@
 CONFIG_USB1_VBUS_PIN="PG13"
 # 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