Related to question / discussion thread at Why local.conf UBOOT_CONFIG updates are not visible in /tmp/deploy/images? ...
Would someone with a mx6ull EVK and a correctly functioning Yocto 'spinor' recipe mind sharing the resulting u-boot spinor image file (attach it to this post please?)?
This is just a guess... but... if the Yocto 'spinor' recipe could finish executing successfully, it would probably produce a file named something like 'u-boot-spinor-2016.03-r0.imx' ...and it should appear within the '/fsl-release-bsp/build-fb/tmp/deploy/images/imx6ull14x14evk/' sub-folder.
Instructions for producing this .imx binary file are with subsection 5.5 of 'i.MX_Yocto_Project_User's_Guide.pdf', as released with the bsp documentation under 'fsl-yocto-L4.1.15_2.0.0-ga'.
Thanks much in advance!