Add quefrency shield

app/boards/shields/quefrency/quefrency.dtsi

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2020 Noah Thornton
+ *
+ * SPDX-License-Identifier: MIT
+ */
+
+#include <dt-bindings/zmk/matrix-transform.h>
+
+/ {
+	chosen {
+	    zmk,kscan = &kscan0;
+
+	    zmk,matrix_transform = &default_transform;
+	};
+
+	default_transform: keymap_transform_0 {
+		compatible = "zmk,matrix-transform";
+		columns = <15>;
+		rows = <6>;
+		map = <
+RC(0,0) RC(0,1) RC(0,2) RC(0,3) RC(0,4) RC(0,5) RC(0,6)   /**/ RC(0,7) RC(0,8) RC(0,9) RC(0,10) RC(0,11) RC(0,12)   RC(0,14)     RC(5,13)     
+RC(1,0)     RC(1,1) RC(1,2) RC(1,3) RC(1,4) RC(1,5)       /**/RC(1,7) RC(1,8) RC(1,9) RC(1,10) RC(1,11) RC(1,12) RC(1,13)   RC(1,14)  RC(5,14)
+RC(2,0)       RC(2,1) RC(2,2) RC(2,3) RC(2,4) RC(2,5)     /**/ RC(2,7) RC(2,8) RC(2,9) RC(2,10) RC(2,11) RC(2,12)     RC(2,14)       RC(2,13) 
+RC(3,0)          RC(3,2) RC(3,3) RC(3,4) RC(3,5) RC(3,6)  /**/   RC(3,7) RC(3,8) RC(3,9) RC(3,10) RC(3,12)     RC(3,13)     RC(3,14) RC(3,11) 
+RC(4,0)  RC(4,1)  RC(4,2)         RC(4,4)         RC(4,6) /**/   RC(4,7)                 RC(4,10) RC(4,11) RC(4,12) RC(4,13) RC(4,14) RC(4,9) 
+		>;
+	};
+};
+