drivers/display/ssd1306.py: Change the SET_COM_PIN_CFG setting.

Making it more specific to use 0x02 for display with an aspect ratio > 2
(resolutions 96x16 and 128x32) and 0x12 for all other sizes as recommended
by @mcauser.  Tested with a 64x32 display which did not work before.

drivers/display/ssd1306.py

@@ -50,7 +50,7 @@ class SSD1306(framebuf.FrameBuffer):
             SET_DISP_OFFSET,
             0x00,
             SET_COM_PIN_CFG,
-            0x02 if self.height == 32 else 0x12,
+            0x02 if self.width > 2 * self.height else 0x12,
             # timing and driving scheme
             SET_DISP_CLK_DIV,
             0x80,