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/Chuwi_V7_CW0825_defconfig b/configs/Chuwi_V7_CW0825_defconfig
index 4ac95a6..4a51f32 100644
--- a/configs/Chuwi_V7_CW0825_defconfig
+++ b/configs/Chuwi_V7_CW0825_defconfig
@@ -15,6 +15,7 @@
 CONFIG_VIDEO_LCD_PANEL_HITACHI_TX18D42VM=y
 # CONFIG_SYS_MALLOC_CLEAR_ON_INIT is not set
 CONFIG_SPL_I2C=y
+CONFIG_SYS_I2C_MVTWSI=y
 CONFIG_USB_MUSB_HOST=y
 CONFIG_VIDEO_LCD_SPI_CS="PA0"
 CONFIG_VIDEO_LCD_SPI_SCLK="PA1"