ASoC: wcd9330: Do not enable test clock for cpe

While enabling the FLL clock for CPE, the test clock was accidently
enabled. Remove the enablement of test clock as this is not required and
used for test mode only. This will reduce leakage on the codec.

CRs-fixed: 658905
Change-Id: I3be31005bef1a9ab5babcc852c7fab9d9b639561
Signed-off-by: Bhalchandra Gajare <gajare@codeaurora.org>