refactor(usb/phy): Start using values from usb_dwc_info in PHY driver

Add tests for PHY sanity checks

components/usb/test_apps/phy/pytest_usb_phy.py

@@ -0,0 +1,13 @@
+# SPDX-FileCopyrightText: 2025 Espressif Systems (Shanghai) CO LTD
+# SPDX-License-Identifier: CC0-1.0
+import pytest
+from pytest_embedded import Dut
+
+
+@pytest.mark.esp32s2
+@pytest.mark.esp32s3
+@pytest.mark.esp32p4
+@pytest.mark.generic
+@pytest.mark.temp_skip_ci(targets=['esp32p4'], reason='P4 PHY not yet migrated')
+def test_usb_phy(dut: Dut) -> None:
+    dut.run_all_single_board_cases(group='phy')