test(i2c): Enhance the stability for i2c tests

Author: mythbuster5

components/esp_driver_i2c/test_apps/i2c_test_apps/main/test_i2c_slave_v2.c

@@ -74,6 +74,7 @@ static void i2c_slave_read_test_v2(void)
         .slave_addr = ESP_SLAVE_ADDR,
         .send_buf_depth = DATA_LENGTH,
         .receive_buf_depth = DATA_LENGTH,
+        .flags.enable_internal_pullup = true,
     };
 
     TEST_ESP_OK(i2c_new_slave_device(&i2c_slv_config, &handle));
@@ -200,6 +201,7 @@ static void slave_write_buffer_test_v2(void)
         .slave_addr = ESP_SLAVE_ADDR,
         .send_buf_depth = DATA_LENGTH,
         .receive_buf_depth = DATA_LENGTH,
+        .flags.enable_internal_pullup = true,
     };
 
     TEST_ESP_OK(i2c_new_slave_device(&i2c_slv_config, &handle));

components/hal/esp32s2/include/hal/i2c_ll.h

@@ -774,8 +774,6 @@ static inline void i2c_ll_slave_init(i2c_dev_t *hw)
     ctrl_reg.sda_force_out = 1;
     ctrl_reg.scl_force_out = 1;
     hw->ctr.val = ctrl_reg.val;
-    hw->fifo_conf.fifo_addr_cfg_en = 0;
-    hw->scl_stretch_conf.slave_scl_stretch_en = 0;
 }
 
 /**