mfd: wcd9xxx: Remove unused codec specific configs

Removed codec specific core configs as codec
core drivers are selected under single
config select value.

CRs-fixed: 2068879
Change-Id: I9641d74b9500af39f1f89c2d82f79a9f21273bd8
Signed-off-by: Karthikeyan Mani <kmani@codeaurora.org>