Have do_geopmread/write print errors
Have do_geopmread/write print errors

Change-Id: Idb5958f1f9c63fefa79df191b7d891a645b1d177
Signed-off-by: Diana Guttman <98d11df29868673c9a01b97a41154316626a31b0@intel.com>

cmcantalupo/geopm,cmcantalupo/geopm,geopm/geopm,cmcantalupo/geopm,geopm/geopm,geopm/geopm,geopm/geopm,cmcantalupo/geopm,cmcantalupo/geopm,geopm/geopm