Makefile (arc/soc/quark_se): New compiler options

GCC 6.x for ARC does not recognize the options
    -mARCv2EM and -mav2em anymore.

Both options replaced in Makefile by -mcpu=quarkse_em.

Change-Id: I9dec26dd64b4738976704a39455fe4241406db9e
Signed-off-by: Juro Bystricky <juro.bystricky@intel.com>
Signed-off-by: Andrew Boie <andrew.p.boie@intel.com>