doc: releases: updates for SDHC and Disk driver release notes

Add release notes for SDHC and Disk drivers, highlighting addition
of NVME support in the disk driver layer as well as CPOL/CPHA clock
modes within the SDHC SPI driver.

Signed-off-by: Daniel DeGrasse <[email protected]>

Author: danieldegrasse

doc/releases/release-notes-3.4.rst

@@ -758,6 +758,7 @@ Drivers and Sensors
 * Disk
 
   * SDMMC STM32L4+: Now compatible with internal DMA
+  * NVME disks are now supported using FATFS, with a single I/O queue enabled
 
 * Display
 
@@ -899,6 +900,9 @@ Drivers and Sensors
 
 * SDHC
 
+  * Support was added for using CPOL/CPHA SPI clock modes with SD cards, as
+    some cards require the SPI clock switch to low when not active
+
 * Sensor
 
   * Added generic voltage measurement sample