working_area_t -> struct working_area

Remove misleading typedef and redundant suffix from struct working_area.

src/flash/stm32x.c

@@ -435,7 +435,7 @@ static int stm32x_write_block(struct flash_bank_s *bank, uint8_t *buffer, uint32
 	struct stm32x_flash_bank *stm32x_info = bank->driver_priv;
 	target_t *target = bank->target;
 	uint32_t buffer_size = 16384;
-	working_area_t *source;
+	struct working_area *source;
 	uint32_t address = bank->base + offset;
 	struct reg_param reg_params[4];
 	struct armv7m_algorithm armv7m_info;