Move some common matrix code to a common location (#7699)

* Move some common matrix code to a common location

* Refactor some 'custom_matrix_helper' logic to use custom matrix lite

* Fix build for kinesis/stapelberg - abuse of vpath was picking up matrix.c from core when custom matrix was enabled

* Add validation for CUSTOM_MATRIX

2 files changed, 4 insertions, 4 deletions

diff --git a/keyboards/kinesis/alvicstep/rules.mk b/keyboards/kinesis/alvicstep/rules.mk
index e69de29bb..232ff719c 100644
--- a/keyboards/kinesis/alvicstep/rules.mk
+++ b/keyboards/kinesis/alvicstep/rules.mk
@@ -0,0 +1,4 @@
+CUSTOM_MATRIX = yes # need to do our own thing with the matrix
+
+# Project specific files
+SRC += matrix.c
diff --git a/keyboards/kinesis/rules.mk b/keyboards/kinesis/rules.mk
index 295054d75..faa3e454c 100644
--- a/keyboards/kinesis/rules.mk
+++ b/keyboards/kinesis/rules.mk
@@ -28,9 +28,5 @@ MIDI_ENABLE = no            # MIDI controls
 UNICODE_ENABLE = no         # Unicode
 BLUETOOTH_ENABLE = no       # Enable Bluetooth with the Adafruit EZ-Key HID
 AUDIO_ENABLE = no # Audio output should be port E6, current quantum library hardcodes C6, which we use for programming
-CUSTOM_MATRIX=yes # need to do our own thing with the matrix
 
 DEFAULT_FOLDER = kinesis/alvicstep
-
-# Project specific files
-SRC = matrix.c