i2c: mvtwsi: sunxi: update macro

While currently none of the newer Allwinner SoCs currently has I2C
support implemented in U-Boot, this will change soon. mvtwsi driver is
good as it is for them except one macro. Update it to be ready once I2C
support lands for those SoCs.

Signed-off-by: Jernej Skrabec <jernej.skrabec@siol.net>
Reviewed-by: Heiko Schocher <hs@denx.de>
Reviewed-by: Samuel Holland <samuel@sholland.org>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
diff --git a/drivers/i2c/mvtwsi.c b/drivers/i2c/mvtwsi.c
index a4d59b6..37b1a06 100644
--- a/drivers/i2c/mvtwsi.c
+++ b/drivers/i2c/mvtwsi.c
@@ -121,7 +121,7 @@
  * on other platforms, it is a normal r/w bit, which is cleared by writing 0.
  */
 
-#ifdef CONFIG_SUNXI_GEN_SUN6I
+#if defined(CONFIG_SUNXI_GEN_SUN6I) || defined(CONFIG_SUN50I_GEN_H6)
 #define	MVTWSI_CONTROL_CLEAR_IFLG	0x00000008
 #else
 #define	MVTWSI_CONTROL_CLEAR_IFLG	0x00000000