usb/ehci-pci: remove 200mA current limitation for DV

usb/ehci-pci: remove 200mA current limitation for DV

BZ: 33514

As in DV, we can support 500mA so the 200mA budget limitation
should be removed.

Change-Id: If70b2aa4a12736229ef66bd608eba0bfd3a0b48c
Signed-off-by: Wu, Hao <hao.wu@intel.com>
Reviewed-on: http://android.intel.com:8080/46054
Reviewed-by: Tang, Richard <richard.tang@intel.com>
Reviewed-by: Tang, Jianqiang <jianqiang.tang@intel.com>
Reviewed-by: Zhuang, Jin Can <jin.can.zhuang@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>