hostname is always "espressif"

[fightforlife]

``Hi there,

I am successfully using this component in my setup for a btproxy node.
But it seems there is an issue with setting the hostname.
It is always set to "espressif", independent of what is set in yml.
This breaks the api and msdns.

relevant issue and pr for the standard ethernet component:
esphome/issues#2184
esphome/esphome#2010

I will try to take a look in the implmentation in the next days.

substitutions:
  name: btproxy
  friendly_name: btproxy

esphome:
  name: ${name}
  friendly_name: ${friendly_name}
    
esp32:
  board: esp32doit-devkit-v1
  framework:
    type: esp-idf

external_components:
  - source:
      type: git
      url: https://github.com/spali/esphome-components
      ref: master # you should pin a commit to prevent unexpected breaking changes
    components:
      - ethernet_spi

ethernet_spi:
  type: w5500
  clk_pin: GPIO18
  mosi_pin: GPIO23
  miso_pin: GPIO19
  cs_pin: GPIO5
  interrupt_pin: GPIO22
  clock_speed: 30 # optional defaults to 30

esp32_ble_tracker:
  scan_parameters:
    interval: 1100ms
    window: 1100ms
    active: false

bluetooth_proxy:
  active: true
  cache_services: True

logger:
  level: VERBOSE
  baud_rate: 115200
debug:
api:
  encryption:
    key: !secret api_secret

ota:
  password: !secret api_secret

web_server:
  port: 80

sensor:
  - platform: debug
    free:
      name: "Heap Free"
    block:
      name: "Heap Max Block"
    loop_time:
      name: "Loop Time"
      id: loop_time

  - platform: uptime
    name: "${friendly_name} - Uptime"
    update_interval: 60s
    icon: mdi:clock-outline
    id: esp_uptime

text_sensor:
  - platform: version
    name: "${friendly_name} - ESPHome Version"
    hide_timestamp: true
  - platform: debug
    device:
      name: "Device Info"
    reset_reason:
      name: "Reset Reason"
      id: reset_reason

binary_sensor:
  - platform: status
    name: "${friendly_name} - Status"