SECO ASTRID (SBC-C61): Add support for U-Boot binman tools to creat final board firmware image.
## Value
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## Description
To create the firmware image we use imx-boot as the firmware packaging tools.
On migrating to U-boot mainline upstream version from Seco'BSP U-Boot, based on NXP's BSP U-Boot we need to add support to binman tools to create the flash.bin with SPL, ATF, U-Boot and OP-Tee OS images.
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## In scope
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## Out of Scope
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## Acceptance Criteria
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## Applicable Market Segments
<!--- (optional, what vertical would this help
* All
* Wearables
* Smart Appliances
* Energy Management
* Security
* Entertainment
* Home Automation
* Lighting
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## Applicable Personas
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* Kernel Developer
* Application Developer
* UI Developer
* Product Integrator
* System Administrator
* Software Quality Auditor
* License Compliance Auditor
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issue