Merge pull request #10984 from sensei-hacker/display_default_i2c

better default display i2c bus

Author: sensei-hacker

src/main/target/common_hardware.c

@@ -426,7 +426,12 @@
 
 #if defined(USE_OLED_UG2864)
     #if !defined(UG2864_I2C_BUS)
-        #define UG2864_I2C_BUS BUS_I2C1
+        #ifdef MAG_I2C_BUS
+            #define UG2864_I2C_BUS MAG_I2C_BUS
+       #else
+            #define UG2864_I2C_BUS DEFAULT_I2C_BUS
+       #endif
+
     #endif
     BUSDEV_REGISTER_I2C(busdev_ug2864,      DEVHW_UG2864,       UG2864_I2C_BUS,     0x3C,               NONE,           DEVFLAGS_NONE,  0);
 #endif