ASoC: WCD9304: Fix OCP register default value

The default value for the OCP current setting register was wrongly updated
causing OCP to trigger when the volume on headphone is maximum. Fix by
correcting the default current setting value for OCP

Change-Id: I9aa6bfe7e4f9dbacdbd1cf1030f83660418bc37f
Signed-off-by: Bhalchandra Gajare <gajare@codeaurora.org>