factory_install: Change flashrom target selection parameters. The "-p internal:bus=*" is deprecated by "-p host" and "-p ec" syntax, especially that now EC may by connected by SPI bus. BUG=none TEST=Try to reset device and see flashrom results correctly. Change-Id: Ibc6e83aae1492a7fd3b6df8da406a062192b74a5 Reviewed-on: https://gerrit.chromium.org/gerrit/66320 Tested-by: Hung-Te Lin <[email protected]> Reviewed-by: Yung-Chieh Lo <[email protected]> Commit-Queue: Hung-Te Lin <[email protected]>