primus: remove gpio DMIC_DET_N
primus: remove gpio DMIC_DET_N

BUG=b:191811895
BRANCH=none
TEST=make buildall

Signed-off-by: Scott Chao <8cefa9751fac9aaa897ba1213763a96ba8dbd20d@wistron.corp-partner.google.com>
Change-Id: I676f2b55b8fc56fa2b31fb5a8987008fa8e51a2d
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3005429
Reviewed-by: Boris Mittelberg <46897f4fb5cad4b1d5146ad1fd460d7f4825bbf7@google.com>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec