binder: backport from nv-linux 3.1

Change-Id: I670fd064bc6ccdf082e94b655f852356414cb875
wifi: disable roaming when in suspend

Change-Id: I0d75a42cff1ba1bfff1d8f3dc1f5ede2cfd0befb
sdhci: workaround from lkml

Change-Id: I103a2f1a555a22e425636355651a760a1704c87f
wifi: re-enable roaming and fix dhd_preinit

Change-Id: I8a7f376840f2a1c302c7eeb1f2c464253e16970b