net: cnss2: Add second element to avoid OOB issue

The struct coex_antenna_switch_to_mdm_resp_msg_v01_ei is
missing with second element and causing OOB issue with
KASAN.

Change-Id: Iac53f5b4883a620f5179fe2caa7e2169d487c619
CRs-Fixed: 2814572
Signed-off-by: Paul Zhang <paulz@codeaurora.org>
Signed-off-by: Manikandan Mohan <manikand@codeaurora.org>