Remarkable port (#5828)

Touchscreen is mirrored in X & Y and has a different resolution from the eink panel.

Uses systemd for time/date/suspend/poweroff/reboot
Two systemd units for platform integration. button-listen is a very
simple launcher.
to-do: add support for wifi by implementing  a wpa supplicant dbus client.

Authored-by: Thomas Spurden <tcrs@users.noreply.github.com>

kodev

@@ -116,6 +116,7 @@ SUPPORTED_TARGETS="
     kindle-legacy   Needed only for Kindle2/3/DXG
     kobo
     cervantes
+    remarkable
     sony-prstux
     android
     pocketbook
@@ -187,6 +188,10 @@ ${SUPPORTED_TARGETS}"
             make TARGET=kobo
             assert_ret_zero $?
             ;;
+        remarkable)
+            make TARGET=remarkable
+            assert_ret_zero $?
+            ;;
         sony-prstux)
             make TARGET=sony-prstux
             assert_ret_zero $?
@@ -303,6 +308,9 @@ ${SUPPORTED_TARGETS}"
         kobo)
             make TARGET=kobo clean
             ;;
+        remarkable)
+            make TARGET=remarkable clean
+            ;;
         sony-prstux)
             make TARGET=sony-prstux clean
             ;;
@@ -413,6 +421,10 @@ ${SUPPORTED_RELEASE_TARGETS}"
             kodev-build kobo
             make TARGET=kobo update
             ;;
+        remarkable)
+            kodev-build remarkable
+            make TARGET=remarkable update
+            ;;
         sony-prstux)
             kodev-build sony-prstux
             make TARGET=sony-prstux update