wcnss: Add support for nv bin download at coldboot

NV bin is downloaded when wlan driver is loaded. This change
adds support for NV bin download during coldboot of WCNSS and
thus much before wlan driver is loaded. NV bin id not downloaded
by platform driver during SSR.

Change-Id: I44065185e73a9d43ab7e5d731705321522a0e5a1
Acked-by: Rajesh Chauhan <rajeshc@qca.qualcomm.com>
Signed-off-by: Sameer Thalappil <sameert@codeaurora.org>