soc: qcom: hyp_core_ctl: Minor cleanup

Change member sid in driver data structure to cap_id.
Fix condition check in hh_vcpu_done_populate_affinity_info for better
readability.

Change-Id: Idc7f8a4fd6b6a7ac8e004eb96c2020a9f1f4444b
Signed-off-by: Sai Harshini Nimmala <snimmala@codeaurora.org>