soc: qcom: service-locator: Fix error message prints for receiving messages

ENOMSG is not a real failure return code for qmi_recv_msg. Instead ENOMSG
signifies that we have finished reading the entirety of the message buffer.
Update the error condition to print errors only when any error message
other than ENOMSG is returned.

Change-Id: Id6b42df182cb02f2cbffaae9698363b7dafce4e4
Signed-off-by: Kyle Yan <kyan@codeaurora.org>