docs(spi_lcd): update supported spi mode description

Closes #14605

Author: Kainarx

docs/en/api-reference/peripherals/lcd/spi_lcd.rst

@@ -5,14 +5,16 @@ SPI Interfaced LCD
 
 #. Create an SPI bus. Please refer to :doc:`SPI Master API doc </api-reference/peripherals/spi_master>` for more details.
 
+    Currently the driver supports SPI, Quad SPI and Octal SPI (simulate Intel 8080 timing) modes.
+
     .. code-block:: c
 
         spi_bus_config_t buscfg = {
             .sclk_io_num = EXAMPLE_PIN_NUM_SCLK,
             .mosi_io_num = EXAMPLE_PIN_NUM_MOSI,
             .miso_io_num = EXAMPLE_PIN_NUM_MISO,
-            .quadwp_io_num = -1, // Quad SPI LCD driver is not yet supported
-            .quadhd_io_num = -1, // Quad SPI LCD driver is not yet supported
+            .quadwp_io_num = -1,
+            .quadhd_io_num = -1,
             .max_transfer_sz = EXAMPLE_LCD_H_RES * 80 * sizeof(uint16_t), // transfer 80 lines of pixels (assume pixel is RGB565) at most in one SPI transaction
         };
         ESP_ERROR_CHECK(spi_bus_initialize(LCD_HOST, &buscfg, SPI_DMA_CH_AUTO)); // Enable the DMA feature

docs/zh_CN/api-reference/peripherals/lcd/spi_lcd.rst

@@ -5,14 +5,16 @@ SPI 接口的 LCD
 
 #. 创建 SPI 总线。详情请参阅 :doc:`SPI 主机 API 文档 </api-reference/peripherals/spi_master>`。
 
+    目前驱动支持 SPI， Quad SPI 和 Octal SPI（模拟 Intel 8080 时序）模式。
+
     .. code-block:: c
 
         spi_bus_config_t buscfg = {
             .sclk_io_num = EXAMPLE_PIN_NUM_SCLK,
             .mosi_io_num = EXAMPLE_PIN_NUM_MOSI,
             .miso_io_num = EXAMPLE_PIN_NUM_MISO,
-            .quadwp_io_num = -1, // 目前不支持 Quad SPI LCD 驱动
-            .quadhd_io_num = -1, // 目前不支持 Quad SPI LCD 驱动
+            .quadwp_io_num = -1,
+            .quadhd_io_num = -1,
             .max_transfer_sz = EXAMPLE_LCD_H_RES * 80 * sizeof(uint16_t), // 单次最多可传输 80 行像素（假设像素格式为 RGB565）
         };
         ESP_ERROR_CHECK(spi_bus_initialize(LCD_HOST, &buscfg, SPI_DMA_CH_AUTO)); // 启用 DMA