mmc: sdhci-msm: Change pm_qos cpu groups latency to PM_QOS_DEFAULT_VALUE

In current pm_qos implementation - when the new pm_qos vote request
comes, the previous cpu group where pm_qos vote was put
is determined and removed if the current cpu group is different
than previous.

If the pm_qos vote of performance mode latency is put during
initialization, there can be a case where this vote will never be
released - since during init phase we can't cache the prev pm_qos cpu
group (pm_qos_prev_cpu = -1). Thus during the actual I/O sdhci_request
the pm_qos_prev_cpu will be -1 and unless the request comes once onto
each of those cpu group, the pm_qos voting can never be released.

Hence change this pm_qos vote for all cpu groups to PM_QOS_DEFAULT_VALUE
during init phase.

Change-Id: I71249b58f41850a8a84e6165d6df936eba13b218
Signed-off-by: Ritesh Harjani <riteshh@codeaurora.org>