soc: qcom: Fix identified corner cases.

Fix identified corner cases with respect to
early services.

1. Allow hot adding of non-earlydomain cpus.
2. NOP for apis when earlydomain is inactive.
3. Loop for size of cpumask and not cpumask_t

Change-Id: Iad00ee6468232e2072eb3bbcd2e70faedc7c7886
Signed-off-by: Vivek Kumar <vivekuma@codeaurora.org>