mach-midas:increase usb charging to 1700

USB hubs that can't provide this output will default to the highest possible output it can provide. We've set it at 1700 as using GPS, BT, WiFi Tethering and Data while plugged into a USB port can't adequately supply the power required to charge the device at the defaults of 475 and 450 respectively. 1700 is the value used by default for the AC and Dock charging output so we're bringing USB charging up to the known maximum safe charging value.

Signed-off-by: sarcastillo <sar.castillo@gmail.com>