dts: arm: adi: max32650: Add more peripheral nodes

This commit adds following updates to MAX32650 SoC:
- Divide SRAM to sections according to UG.
- Add DMA and SPI nodes
- Add WDT nodes without adding clock property
- Include dma binding to SoC dts file.

Signed-off-by: Furkan Akkiz <hasanfurkan.akkiz@analog.com>
Signed-off-by: Burak Babaoglu <burak.babaoglu@analog.com>