qseecom: Remove core affinity requirement when loading external elf files

Remove the requirement for external elf images to be loaded on CPU0
permitting loading on any core

Change-Id: I32275a2f2a71ee25031baa1657c3430308d54d3c
Acked-by: Tony Hamilton <tonyh@qti.qualcomm.com>
Signed-off-by: Puneet Mishra <puneetm@codeaurora.org>
Signed-off-by: Bikshapathi Kothapeta <bkotha@codeaurora.org>