imx-kobs: bump to version 5.1

imx-kobs: bump to version 5.1

Use a different versioning schema based on package versioning
instead of BSP version. This way, if a new BSP version does
not bump this package, we can keep this package unchanged as well.

Changelog since 3.14.28-1.0.0_ga:
- Add fixes for maximum ecc strength for each platform.
- Add mx7 boot config support.
- Add i.MX 6UltraLite support.
- Join the ecc with real FCB data when not byte-aligned.
- Generalize the encode_bch_ecc function for different configurations.

This patch is based on the Yocto equivalent:
https://github.com/Freescale/meta-fsl-arm/commit/8d47a2e
https://github.com/Freescale/meta-fsl-arm/commit/70edf16

Signed-off-by: Gary Bisson <gary.bisson@boundarydevices.com>
Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>