prd-flash: migrate wireless configuration
prd-flash: migrate wireless configuration

This patch fixes prd-flash to migrate the previous wireless
configuration.

Signed-off-by: Tobias Theophile <bcdc92cf9638fd48c8663da01bdfef0a7b7ddbba@rademacher.de>

tobw/meta-jens,tobw/meta-jens,rdm-dev/meta-jens,rdm-dev/meta-jens,rdm-dev/meta-jens,rdm-dev/meta-jens,tobw/meta-jens,tobw/meta-jens