commonlib/storage: Make sd_mmc_go_idle an api

change sd_mmc_go_idle to be accessible from other files
so that we have an api to send CMD0 and reset the card.

BUG=b:78106689
TEST=Boot to OS

Change-Id: I064a9bded347be5d500047df92d1c448c3392016
Signed-off-by: Bora Guvendik <bora.guvendik@intel.com>
Reviewed-on: https://review.coreboot.org/25066
Reviewed-by: Justin TerAvest <teravest@chromium.org>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2 files changed