[Keyboard] fix compile error `make helix/rev2/sc:all` (#14214)

keyboards/helix/rev2/local_features.mk

@@ -164,6 +164,16 @@ ifeq ($(strip $(OLED_ENABLE)), yes)
            OPT_DEFS += -DOLED_FONT_H=\"common/glcdfont.c\"
         endif
     else
+        ifeq ($(strip $(SPLIT_KEYBOARD)), yes)
+            $(info Helix/rev2: The following combinations are not supported.)
+            $(info - SPLIT_KEYBOARD = $(SPLIT_KEYBOARD)) # yes
+            $(info - OLED_ENABLE    = $(OLED_ENABLE))    # yes
+            $(info - OLED_SELECT    = $(OLED_SELECT))    # local
+            $(info Force : OLED_ENABLE = no)
+            $(info .)
+            OLED_ENABLE = no
+        endif
+        ifeq ($(strip $(OLED_ENABLE)), yes)
             OLED_ENABLE = no # disable OLED in TOP/common_features.mk
             OLED_LOCAL_ENABLE = yes
             SRC += local_drivers/i2c.c
@@ -175,6 +185,7 @@ ifeq ($(strip $(OLED_ENABLE)), yes)
             endif
         endif
     endif
+endif
 
 ifneq ($(strip $(SHOW_HELIX_OPTIONS)),)
   $(eval $(call HELIX_CUSTOMISE_MSG))