Move Wireless Paper V1.1 custom hibernate behavior to GxEPD2

Previously implemented with a macro, in meshtastic/firmware.

src/epd/GxEPD2_213_FC1.cpp

@@ -158,19 +158,10 @@ void GxEPD2_213_FC1::powerOff()
   _PowerOff();
 }
 
-// Put the display into an extra-low power state. Hard reset required to wake.
-// Caution: will wipe display memory - problematic for fast-refresh, so not used by meshtastic
+// No hibernate for this display, only power off. Preserves image memory for fast refresh.
 void GxEPD2_213_FC1::hibernate()
 {
   _PowerOff();
-  if (_rst >= 0)
-  {
-    _writeCommand(0x07); // deep sleep mode
-    _writeData(0xA5);     // enter deep sleep
-    _hibernating = true;
-    _configured_for_full = false;
-    _configured_for_fast = false;
-  }
 }
 
 void GxEPD2_213_FC1::_PowerOn()
@@ -280,7 +271,6 @@ void GxEPD2_213_FC1::_Update_Full()
   _PowerOn();
   _writeCommand(0x12);
   _waitWhileBusy("_Update_Full", full_refresh_time);
-  _PowerOff();
 }
 
 void GxEPD2_213_FC1::_Update_Part()
@@ -289,7 +279,6 @@ void GxEPD2_213_FC1::_Update_Part()
   _PowerOn();
   _writeCommand(0x12);
   _waitWhileBusy("_Update_Part", partial_refresh_time);
-  _PowerOff();
 }
 
 // Fast refresh waveform is unofficial (experimental?)

src/epd/GxEPD2_213_FC1.h

@@ -44,7 +44,7 @@ class GxEPD2_213_FC1 : public GxEPD2_EPD
     void refresh(bool partial_update_mode = false); // screen refresh from controller memory to full screen
     void refresh(int16_t x, int16_t y, int16_t w, int16_t h); // screen refresh from controller memory, fast-refresh
     void powerOff(); // turns off generation of panel driving voltages, avoids screen fading over time
-    void hibernate(); // turns powerOff() and sets controller to deep sleep for minimum power use, ONLY if wakeable by RST (rst >= 0)
+    void hibernate(); // For this display, no deep sleep, only power off. Preserves image memory for fast refresh
 
   // Unimplemented for meshtastic
   public: