[Keyboard] add kb-elmo boards (#9898)

* add kb-elmo boards

* Apply suggestions from code review

* Apply suggestions from code review

* Apply suggestions from code review

* fix wrong names

* fix VID and UID

keyboards/kb_elmo/elmopad/keymaps/default/keymap.c

@@ -0,0 +1,28 @@
+/* Copyright 2020 kb-elmo<mail@elmo.space>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#include QMK_KEYBOARD_H
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    /* Base */
+    [0] = LAYOUT_numpad_6x4(
+        KC_ESC,  KC_TAB,  KC_DEL,  KC_BSPC,
+        KC_NLCK, KC_PSLS, KC_PAST, KC_PMNS,
+        KC_P7,   KC_P8,   KC_P9,
+        KC_P4,   KC_P5,   KC_P6,   KC_PPLS,
+        KC_P1,   KC_P2,   KC_P3,
+        KC_P0,            KC_PDOT, KC_PENT
+    )
+};