ASoC: wcd9335: Remove debug mode for CPE block

CPE hardware block in the codec is currently enabled in debug mode to
override some known issues. Since all issues are fixed, remove the
debug mode for CPE.

Change-Id: Ia7b35aecd2280b40739dc620c4ed76bdf71dacf9
Signed-off-by: Bhalchandra Gajare <gajare@codeaurora.org>