Feature ccx flashboot

[CFD2]

Summary

This PR introduces boot from flash XiP functionality to imxrt1064-ccx board. The new Kconfig variables, CONFIG_IMXRT_BOOT_COPYTORAM and CONFIG_BOOT_COPYTORAM, are introduced so that selecting the boot source can be done from configuration files. Setting these variable to "y" selects the microSD Card as the primary boot option. The SIP Flash is the primary boot option otherwise.

Testing

Using updated config files NuttX images were built and booted from both mediums being SIP Flash and microSD Card.

Reading from I2C:

• voltage monitoring ADC
• RTD ADC
• EEPROM
• Temperature sensor

Reading from SPI:

• static pressure sensor

Ethernet 1:

• ping
• telnet client

LEDs and discretes:

• can be controlled

USB OTG:

• mounted FAT32 partition
• read from a file
• write to a file

UART:

• serial console on LPUART1
• serial console on LPUART3
• serial console on LPUART4