Port #1576 to Let's Split: EECONFIG_HANDEDNESS gets overridden when RGB is enabled

keyboards/lets_split/eeprom-lefthand.eep

@@ -1,2 +1,2 @@
-:0B0000000000000000000000000001F4
+:0F000000000000000000000000000000000001F0
 :00000001FF

keyboards/lets_split/eeprom-righthand.eep

@@ -1,2 +1,2 @@
-:0B0000000000000000000000000000F5
+:0F000000000000000000000000000000000000F1
 :00000001FF

keyboards/lets_split/split_util.h

@@ -2,11 +2,7 @@
 #define SPLIT_KEYBOARD_UTIL_H
 
 #include <stdbool.h>
-
-#ifdef EE_HANDS
-	#define EECONFIG_BOOTMAGIC_END      (uint8_t *)10
-	#define EECONFIG_HANDEDNESS         EECONFIG_BOOTMAGIC_END
-#endif
+#include "eeconfig.h"
 
 #define SLAVE_I2C_ADDRESS           0x32