spi_master:support octal mode for esp32s2 and esp32s3

Add support for 8-line spi for lcd on esp32s2 and esp32s3

Closes https://github.com/espressif/esp-idf/issues/6371

components/esp_lcd/include/esp_lcd_panel_io.h

@@ -80,6 +80,7 @@ typedef struct {
     struct {
         unsigned int dc_as_cmd_phase: 1; /*!< D/C line value is encoded into SPI transaction command phase */
         unsigned int dc_low_on_data: 1;  /*!< If this flag is enabled, DC line = 0 means transfer data, DC line = 1 means transfer command; vice versa */
+        unsigned int octal_mode: 1;      /*!< transmit with octal mode (8 data lines), this mode is used to simulate Intel 8080 timing */
     } flags;
 } esp_lcd_panel_io_spi_config_t;