[Keyboard] Fix pins, add VIA support for Stream Cheap 2x4 (#14001)

Co-authored-by: Drashna Jaelre <drashna@live.com>

keyboards/handwired/stream_cheap/2x4/keymaps/via/keymap.c

@@ -0,0 +1,43 @@
+/* Copyright 2021 Matthias Liffers
+  *
+  * 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
+
+enum layers {
+  NORMAL_LAYER,
+  SECOND_LAYER,
+  THIRD_LAYER,
+  FOURTH_LAYER
+};
+
+const uint16_t PROGMEM keymaps[][MATRIX_ROWS][MATRIX_COLS] = {
+    [NORMAL_LAYER] = LAYOUT_ortho_2x4(
+        KC_A, KC_A, KC_A, TO(3),
+        KC_A, KC_A, KC_A, TO(1)
+    ),
+    [SECOND_LAYER] = LAYOUT_ortho_2x4(
+        KC_B, KC_B, KC_B, TO(0),
+        KC_B, KC_B, KC_B, TO(2)
+    ),
+    [THIRD_LAYER] = LAYOUT_ortho_2x4(
+        KC_C, KC_C, KC_C, TO(1),
+        KC_C, KC_C, KC_C, TO(3)
+    ),
+    [FOURTH_LAYER] = LAYOUT_ortho_2x4(
+        KC_D, KC_D, KC_D, TO(2),
+        KC_D, KC_D, KC_D, TO(0)
+    )
+};

keyboards/handwired/stream_cheap/2x4/keymaps/via/rules.mk

@@ -0,0 +1 @@
+VIA_ENABLE = yes