Refactor Equinox PCB revisions (#8266)

* Refactor Equinox PCB revisions

* typo

keyboards/ai03/equinox/rev1/config.h

@@ -0,0 +1,18 @@
+/*
+Copyright 2019 Ryota Goto
+
+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/>.
+*/
+
+#pragma once

keyboards/ai03/equinox/rev1/rules.mk

@@ -0,0 +1 @@
+# Dummy rules.mk, rev1 uses parent rules.mk as is