Merge t-echo display support (currently non-scaled)

Boards.h

@@ -672,6 +672,7 @@
   #elif MCU_VARIANT == MCU_NRF52
      #if BOARD_MODEL == BOARD_TECHO
       #define VALIDATE_FIRMWARE false
+      #define HAS_INPUT true
       //#define GPS_BAUD_RATE 115200
       //#define PIN_GPS_TX 41
       //#define PIN_GPS_RX 40
@@ -679,17 +680,18 @@
       #define EEPROM_OFFSET EEPROM_SIZE-EEPROM_RESERVED
       //#define HAS_EEPROM true
       //#define HAS_SD true
-      //#define HAS_DISPLAY true
+      #define HAS_DISPLAY true
+      #define DISPLAY EINK_BW
+      #define DISPLAY_MODEL GxEPD2_154_D67
       //#define HAS_CONSOLE true
       //#define HAS_TXCO true
-      //#define DISPLAY EINK_BW
       //#define HAS_BLE true
       //#define HAS_PMU true
       #define CONFIG_UART_BUFFER_SIZE 40000
       #define CONFIG_QUEUE_0_SIZE 6144
       #define CONFIG_QUEUE_MAX_LENGTH 200
-      #define BLE_MANUFACTURER "LilyGO"
-      #define BLE_MODEL "T-Echo"
+      //#define BLE_MANUFACTURER "LilyGO"
+      //#define BLE_MODEL "T-Echo"
       #define INTERFACE_COUNT 1
       //#define I2C_SDA 26
       //#define I2C_SCL 27
@@ -726,6 +728,13 @@
       const int pin_disp_reset = 2;
       const int pin_disp_busy = 3;
       const int pin_disp_en = 43;
+      const int pin_disp_sck = 31;
+      const int pin_disp_mosi = 29;
+      const int pin_disp_miso = -1;
+
+      #define HAS_BACKLIGHT true
+      const int pin_btn_usr1 = 42;
+      const int pin_backlight = 43;
 
       const int pin_led_rx = LED_BLUE;
       const int pin_led_tx = LED_RED;

Device.h

@@ -324,7 +324,8 @@ bool device_init() {
   }
   #else
   // Skip hash comparison and checking BT
-  return true;
+  device_init_done = true;
+  return device_init_done;
   #endif
 }
 #endif

Graphics.h

@@ -13,402 +13,7 @@
 // You should have received a copy of the GNU General Public License
 // along with this program.  If not, see <https://www.gnu.org/licenses/>.
 
-#if DISP_H == UNSCALED_MAX
-// use 64px wide graphics
-
-const unsigned char bm_cable [] PROGMEM = {
-   0x00, 0x00, 0x00, 0x1c, 0x00, 0x38, 0x07, 0xfc, 0x08, <