[mipi_dsi] Allow transform disable; fix warnings (#14216)

tests/component_tests/mipi_dsi/fixtures/mipi_dsi.yaml

@@ -22,6 +22,23 @@ display:
     id: p4_86
     model: "WAVESHARE-P4-86-PANEL"
     rotation: 180
+  - platform: mipi_dsi
+    model: custom
+    id: custom_id
+    dimensions:
+      width: 400
+      height: 1280
+    hsync_back_porch: 40
+    hsync_pulse_width: 30
+    hsync_front_porch: 40
+    vsync_back_porch: 20
+    vsync_pulse_width: 10
+    vsync_front_porch: 20
+    pclk_frequency: 48Mhz
+    lane_bit_rate: 1.2Gbps
+    rotation: 180
+    transform: disabled
+    init_sequence:
 i2c:
   sda: GPIO7
   scl: GPIO8

tests/component_tests/mipi_dsi/test_mipi_dsi_config.py

@@ -123,7 +123,8 @@ def test_code_generation(
         in main_cpp
     )
     assert "set_init_sequence({224, 1, 0, 225, 1, 147, 226, 1," in main_cpp
-    assert "p4_nano->set_lane_bit_rate(1500);" in main_cpp
+    assert "p4_nano->set_lane_bit_rate(1500.0f);" in main_cpp
     assert "p4_nano->set_rotation(display::DISPLAY_ROTATION_90_DEGREES);" in main_cpp
     assert "p4_86->set_rotation(display::DISPLAY_ROTATION_0_DEGREES);" in main_cpp
+    assert "custom_id->set_rotation(display::DISPLAY_ROTATION_180_DEGREES);" in main_cpp
     # assert "backlight_id = new light::LightState(mipi_dsi_dsibacklight_id);" in main_cpp