msm: msm_xo: Set the correct bits for XO_CORE on 8660

The bit layout for the xo buffer interface has changed between
8660 and 8960. Instead of adding a cpu_is() check into this
driver, just set both bits for XO_CORE so that this driver can
work on both chips at the same time. This restores the XO_CORE
functionality that was lost when the xo interface was updated for
8960.

Change-Id: Ibd8d4981d715191abcedda493ce35f22acb070a1
CRs-Fixed: 326344
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>