Add Support TinyBoy2 OLED/Encoder panel

The OLED is driven by an SSD1306, connected to the board via
I2C, the rotary encoder is connected to 3 GPIO pins.

Signed-off-by: Stefan Brüns <stefan.bruens@rwth-aachen.de>

Marlin/SanityCheck.h

@@ -1017,7 +1017,7 @@ static_assert(1 >= 0
   #if ENABLED(LCD_I2C_VIKI)
     + 1
   #endif
-  #if ENABLED(U8GLIB_SSD1306)
+  #if ENABLED(U8GLIB_SSD1306) && DISABLED(OLED_PANEL_TINYBOY2)
     + 1
   #endif
   #if ENABLED(SAV_3DLCD)
@@ -1029,5 +1029,8 @@ static_assert(1 >= 0
   #if ENABLED(SAV_3DGLCD)
     + 1
   #endif
+  #if ENABLED(OLED_PANEL_TINYBOY2)
+    + 1
+  #endif
   , "Please select no more than one LCD controller option."
 );