[armhf] Enable NVMEM_IMX_OCOTP

On iMX6Q boards, when probing cpufreq, it tries to read efuse settings, however, as NVMEM_IMX_OCOTP is not enabled this can't be done. In this situation the probe fails with -EPROBE_DEFER, and cpufreq is not available. Additionally, in case of enabling it as a module, an -EPROBE_DEFER might still be triggered which due to an error in the cleanup procedure generates a warning.

To avoid all the mentioned issues, while these issues are fixed in the upstream kernel, enable NVMEM_IMX_OCOTP as builtin driver.

Signed-off-by: Walter Lozano walter.lozano@collabora.com