rnndb: Add FECS.FEATURE_OVERRIDE_ECC
rnndb: Add FECS.FEATURE_OVERRIDE_ECC

Pascal supports ECC memory with an enable override, which can apply to any of
SM LRF, SM SHM, TEX or LTC.

Source:
 - https://nv-tegra.nvidia.com/gitweb/?p=linux-nvgpu.git;a=blob;f=drivers/gpu/nvgpu/include/nvgpu/hw/gp10b/hw_gr_gp10b.h;hb=refs/tags/tegra-l4t-r28.2#l1521

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