Added implementation of WB32 MCU wear_leveling_efl. (#17579)

platforms/chibios/drivers/wear_leveling/wear_leveling_efl_config.h

@@ -14,6 +14,8 @@
 #        define BACKING_STORE_WRITE_SIZE 2 // from hal_efl_lld.c
 #    elif defined(QMK_MCU_FAMILY_NUC123)
 #        define BACKING_STORE_WRITE_SIZE 4 // from hal_efl_lld.c
+#    elif defined(QMK_MCU_FAMILY_WB32)
+#        define BACKING_STORE_WRITE_SIZE 8 // from hal_efl_lld.c
 #    elif defined(QMK_MCU_FAMILY_STM32)
 #        if defined(STM32_FLASH_LINE_SIZE) // from some family's stm32_registry.h file
 #            define BACKING_STORE_WRITE_SIZE (STM32_FLASH_LINE_SIZE)