SEMC configuration for SDRAM access

[Sathishkumar-rk]

Hi @danieldegrasse @d3zd3z

I want to use the SDRAM for zephyr application running, below is detailed requirement for my project using mimxrt1160_evk_cm7.

MCUBoot will copy the latest image from primary or secondary slot based on image version using RAM Loading feature and then I want run the application from RAM location.

1. I was able to copy the content in DTCM location but while execution it still running from flash (expected behavior is running from dtcm location).
2. While trying to copy to SDRAM location (0x80004000) getting bus fault error, looks like need to configure the SEMC before accessing SDRAM. How to do the SEMC initialization to access SDRAM.