lrdp_v2: Remove scandump dependency on core context.

   Scandump parser generates .cmm files for registers
extracted from scandump. TZ/SDI extracts context into dumptable.
Both are different and independent. Scandump context
shouldn't overwrite SDI/TZ context, otherwise we don't get
proper context in Non-secure WDT issues.

Change-Id: If5b3e4de8519e199f3c54f7205208f513661ca7c