i2c: stm32f7: add stm32mp15 compatible

Add a new compatible "st,stm32mp15-i2c" introduced in Linux kernel v5.8
Signed-off-by: NPatrick Delaunay <patrick.delaunay@st.com>
Reviewed-by: NHeiko Schocher <hs@denx.de>

drivers/i2c/stm32f7_i2c.c

@@ -873,6 +873,7 @@ static const struct dm_i2c_ops stm32_i2c_ops = {
 
 static const struct udevice_id stm32_i2c_of_match[] = {
 	{ .compatible = "st,stm32f7-i2c", .data = (ulong)&stm32f7_setup },
+	{ .compatible = "st,stm32mp15-i2c", .data = (ulong)&stm32f7_setup },
 	{}
 };