[sfud] Correct dual_io dummy cycle setting to 4.

components/drivers/spi/sfud/src/sfud.c

@@ -218,7 +218,7 @@ sfud_err sfud_qspi_fast_read_enable(sfud_flash *flash, uint8_t data_line_width)
         break;
     case 2:
         if (read_mode & DUAL_IO) {
-            qspi_set_read_cmd_format(flash, SFUD_CMD_DUAL_IO_READ_DATA, 1, 2, 8, 2);
+            qspi_set_read_cmd_format(flash, SFUD_CMD_DUAL_IO_READ_DATA, 1, 2, 4, 2);
         } else if (read_mode & DUAL_OUTPUT) {
             qspi_set_read_cmd_format(flash, SFUD_CMD_DUAL_OUTPUT_READ_DATA, 1, 1, 8, 2);
         } else {