google/reef: set 20K PULLUP on SDCARD DATA/CLK/CMD

SD card need 20K PULLUP on D0-D3/CLOCK/COMMAND lines.
Without this SDCARD will throw data read/write errors.

BUG=chrome-os-partner:54676
TEST=Build and boot to OS.
     Verify SD card is detected and data read/write works well.

Change-Id: I90da5b84dc2e488eb38f805322bd7b4dee394e5b
Signed-off-by: Freddy Paul <freddy.paul@intel.com>
Reviewed-on: https://review.coreboot.org/15345
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Tested-by: build bot (Jenkins)
1 file changed