usb/penwell_otg: increase timeout to keep Vbus invalid in idle state.

usb/penwell_otg: increase timeout to keep Vbus invalid in idle state.

BZ: 28539

This patch workaround resolved the issue VBUS will not stay off for
5s. Also increase A_WAIT_BCON timer for better user experience.

Change-Id: I3c9e24200187081a72425a52ee179019512dde10
Signed-off-by: Wu, Hao <hao.wu@intel.com>
Reviewed-on: http://android.intel.com:8080/40951
Reviewed-by: Zhuang, Jin Can <jin.can.zhuang@intel.com>
Reviewed-by: Tang, Richard <richard.tang@intel.com>
Reviewed-by: Li, Wenji <wenji.li@intel.com>
Reviewed-by: Meng, Zhe <zhe.meng@intel.com>
Tested-by: Meng, Zhe <zhe.meng@intel.com>
Reviewed-by: buildbot <buildbot@intel.com>
Tested-by: buildbot <buildbot@intel.com>