cr50: request 0mA instead of 500mA for CCD
cr50: request 0mA instead of 500mA for CCD

This changes the usb descriptor to set the MaxPower to 0mA instead of
500mA.

BUG=chrome-os-partner:59564
BRANCH=none
TEST=Verify 'lsusb -vd 18d1:5014 | grep MaxPower' shows the power is 0mA

Change-Id: Ieeb8dec6c205f4fe51392f8106b3a0ed7d3ea0a5
Signed-off-by: Mary Ruthven <81380f3403fed74252e92df3ed012a1819ec6296@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/410288
Reviewed-by: Vadim Bendebury <5515d6d2d0829cbe0dd0dcf2094aaded06d58514@chromium.org>
Reviewed-by: David Schneider <f6dc7060de10912bba612c52f98c21c17bd19e92@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec