qspi_flash example broken

[bjoernQ]

Only tested on ESP32-C6 - but most probably the problem is present for other chips, too.

54ee3641309d3530226e71277102038a1cda9281 is the first bad commit
commit 54ee3641309d3530226e71277102038a1cda9281
Author: Juraj Sadel <[email protected]>
Date:   Wed Aug 7 15:23:49 2024 +0200

    ESP32(SPI): Disable the write side when reading is being done in DMA … (#1894)

    * ESP32(SPI): Disable the write side when reading is being done in DMA mode

    * disable and re-enable MISO and MOSI in write and transfer methods

    * changelog

 esp-hal/CHANGELOG.md      |  1 +
 esp-hal/src/spi/master.rs | 15 +++++++++++++++
 2 files changed, 16 insertions(+)

[bjoernQ]

Closed via #2013