Make arguments redo, subproject elimination (#1784)

* redo make args to use colons, better folder structuring system [skip ci]

* don't put spaces after statements - hard lessons in makefile development

* fix-up some other rules.mk

* give travis a chance

* reset KEYMAPS variable

* start converting keyboards to new system

* try making all with travis

* redo make args to use colons, better folder structuring system [skip ci]

* don't put spaces after statements - hard lessons in makefile development

* fix-up some other rules.mk

* give travis a chance

* reset KEYMAPS variable

* start converting keyboards to new system

* try making all with travis

* start to update readmes and keyboards

* look in keyboard directories for board.mk

* update visualizer rules

* fix up some other keyboards/keymaps

* fix arm board ld includes

* fix board rules

* fix up remaining keyboards

* reset layout variable

* reset keyboard_layouts

* fix remainging keymaps/boards

* update readmes, docs

* add note to makefile error

* update readmes

* remove planck keymap warnings

* update references and docs

* test out tarvis build stages

* don't use stages for now

* don't use stages for now

4 files changed, 5 insertions, 4 deletions

diff --git a/keyboards/eco/eco.h b/keyboards/eco/eco.h
index 2cfb8df26..4f8cfabd8 100644
--- a/keyboards/eco/eco.h
+++ b/keyboards/eco/eco.h
@@ -1,10 +1,10 @@
 #ifndef ECO_H
 #define ECO_H
 
-#ifdef SUBPROJECT_rev1
+#ifdef KEYBOARD_eco_rev1
     #include "rev1.h"
 #endif
-#ifdef SUBPROJECT_rev2
+#ifdef KEYBOARD_eco_rev2
     #include "rev2.h"
 #endif
 
diff --git a/keyboards/eco/readme.md b/keyboards/eco/readme.md
index d29aa8ece..afa9d5559 100644
--- a/keyboards/eco/readme.md
+++ b/keyboards/eco/readme.md
@@ -10,6 +10,6 @@ Hardware Supported: ECO PCB rev1 Pro Micro
 
 Make example for this keyboard (after setting up your build environment):
 
-    make eco-rev2-that_canadian
+    make eco/rev2:that_canadian
 
 See [build environment setup](https://docs.qmk.fm/build_environment_setup.html) then the [make instructions](https://docs.qmk.fm/make_instructions.html) for more information.
\ No newline at end of file
diff --git a/keyboards/eco/rules.mk b/keyboards/eco/rules.mk
index cf26cdc0d..6f4b4fefc 100644
--- a/keyboards/eco/rules.mk
+++ b/keyboards/eco/rules.mk
@@ -66,3 +66,5 @@ API_SYSEX_ENABLE = no
 
 # Do not enable SLEEP_LED_ENABLE. it uses the same timer as BACKLIGHT_ENABLE
 SLEEP_LED_ENABLE = no    # Breathing sleep LED during USB suspend
+
+DEFAULT_FOLDER = eco/rev2
\ No newline at end of file
diff --git a/keyboards/eco/subproject.mk b/keyboards/eco/subproject.mk
deleted file mode 100644
index 7c9b39598..000000000
--- a/keyboards/eco/subproject.mk
+++ /dev/null
@@ -1 +0,0 @@
-SUBPROJECT_DEFAULT = rev2