cnss: Provide API to CLD Driver to control SPDT GPIO

Antenna Sharing GPIO need to be toggled between QCA PCIe and SDIO
devices based on the requirement. If SDIO device is to be operational,
this GPIO should be turned ON high.

Expose API to CLD Driver to control this GPIO for dual-wifi platforms.

CRs-Fixed: 1013494
Change-Id: I271ba273a4c70717f066d219ff02e8f0f56e2ac3
Signed-off-by: Komal Kumar <kseelam@codeaurora.org>