Make modem peripheral work on esp32p4 with esp_wifi_remote.

[mdwn]

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Submission Checklist 📝

• I have updated existing examples or added new ones (if applicable).
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Pull Request Details 📖

Description

With esp_wifi_remote, the modem peripheral can work as expected on esp32p4. This peripheral is now gated around the presence of the esp_wifi_remote component for esp32p4.

Testing

Using a few other changes:

W (3766) rpc_utils: Event: SSID nerds
I (3787) osc_pedal: Starting WiFi...
I (3894) RPC_WRAP: ESP Event: wifi station started
I (3914) RPC_WRAP: ESP Event: wifi station started
I (4030) osc_pedal: WiFi started. Connecting...
I (4030) H_API: esp_wifi_remote_connect
I (6941) RPC_WRAP: ESP Event: Station mode: Connected
I (6941) esp_wifi_remote: esp_wifi_internal_reg_rxcb: sta: 0x40077b54
I (6969) osc_pedal: WiFi connected. Waiting for network interface...
I (7954) esp_netif_handlers: sta ip: 192.168.1.130, mask: 255.255.0.0, gw: 192.168.1.1
I (7982) osc_pedal: WiFi connected! IP: 192.168.1.130
I (7982) osc_pedal: WiFi test passed!

Related to:

• Support esp_wifi_remote for esp32p4. esp-idf-svc#640
• esp_wifi_remote/esp_hosted bindings. esp-idf-sys#404