soc: qcom: Avoid possible buffer overflow in service-locator

Fix possible buffer overflow by reading 'resp->total_domains' from the
qmi response message since 'resp->total_domains' indicate total number
of matching domains found by servreg.
'resp->domain_list_len' indicates the domains that could be sent in one
response which should not be greater than 'resp->total_domains'.

CRs-Fixed: 2009016
Change-Id: I614561c5f9bc996689129bc098baaffc9b59c377
Signed-off-by: Puja Gupta <pujag@codeaurora.org>
Signed-off-by: Satya Durga Srinivasu Prabhala <satyap@codeaurora.org>