Fixed epaper power up sequence

Default TPS65186 power up sequence had swapped VEE and VNEG sequence.

Author: BornaBiro

src/Inkplate.cpp

@@ -104,6 +104,12 @@ int Inkplate::einkOn()
     Wire.beginTransmission(0x48);
     Wire.write(0x01);
     Wire.write(B00101111);
+    Wire.endTransmission();
+	
+	// Modify power up sequence  (VEE and VNEG are swapped)
+	Wire.beginTransmission(0x48);
+    Wire.write(0x09);
+    Wire.write(B11100001);
     Wire.endTransmission();
 
     delay(1);