mlx-mkbfb: append capsule prior to appending boot parameters
mlx-mkbfb: append capsule prior to appending boot parameters

As the capsule is expected to be read before the boot parameters
(boot-desc, boot-path and boot-args), then generate the capsule
first. This will prevent the boot parameters from being overwritten
during UEFI BDS phase.

Mellanox/bfscripts,Mellanox/bfscripts