Current code has .enable_reg and .enable_mask settings, but the implementation
for corresponding callbacks are missing. Fix it.
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Tested-by: NRobin Gong <b38343@freescale.com>
Acked-by: NRobin Gong <b38343@freescale.com>
Signed-off-by: NMark Brown <broonie@linaro.org>