Add LAYOUTS entry to rules.mk (#15900)

* Add layouts to rules.mk

* Remove excess settings.

Co-authored-by: Joel Challis <git@zvecr.com>

Co-authored-by: Joel Challis <git@zvecr.com>

keyboards/a_dux/rules.mk

@@ -15,6 +15,7 @@ COMMAND_ENABLE = no         # Commands for debug and configuration
 NKRO_ENABLE = yes           # Enable N-Key Rollover
 BACKLIGHT_ENABLE = no       # Enable keyboard backlight functionality
 RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
+UNICODE_ENABLE = yes        # Unicode
 AUDIO_ENABLE = no           # Audio output
-UNICODE_ENABLE = yes
-SPLIT_KEYBOARD = yes
+SPLIT_KEYBOARD = yes        # Use shared split_common code
+LAYOUTS = split_3x5_2

keyboards/cradio/cradio.h

@@ -48,3 +48,5 @@
         { R16, R17, ___, ___, ___ }  \
     }
 
+#define LAYOUT LAYOUT_split_3x5_2
+

keyboards/cradio/rules.mk

@@ -18,3 +18,4 @@ RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
 UNICODE_ENABLE = yes        # Unicode
 AUDIO_ENABLE = no           # Audio output
 SPLIT_KEYBOARD = yes        # Use shared split_common code
+LAYOUTS = split_3x5_2

keyboards/ferris/0_1/rules.mk

@@ -23,3 +23,5 @@ LTO_ENABLE = yes
 
 SRC += matrix.c
 QUANTUM_LIB_SRC += i2c_master.c
+
+LAYOUTS = split_3x5_2

keyboards/ferris/0_2/rules.mk

@@ -23,3 +23,5 @@ LTO_ENABLE = no
 
 SRC += matrix.c
 QUANTUM_LIB_SRC += i2c_master.c
+
+LAYOUTS = split_3x5_2

keyboards/ferris/sweep/rules.mk

@@ -18,3 +18,4 @@ RGBLIGHT_ENABLE = no        # Enable keyboard RGB underglow
 UNICODE_ENABLE = yes        # Unicode
 AUDIO_ENABLE = no           # Audio output
 SPLIT_KEYBOARD = yes        # Use shared split_common code
+LAYOUTS = split_3x5_2