kernel 3.10.64 adds const to 2nd arg of dev_mc_add
kernel 3.10.64 adds const to 2nd arg of dev_mc_add

- we check whether dev_mc_add has two arguments, however, the
  check was using a non-const second argument: kernel 3.10.64
  has a const on the second argument, so we need to check for
  either.

kerr-huang/openss7,openss7/openss7,openss7/openss7,kerr-huang/openss7,kerr-huang/openss7,kerr-huang/openss7,openss7/openss7,openss7/openss7,openss7/openss7,kerr-huang/openss7,openss7/openss7,kerr-huang/openss7,openss7/openss7,kerr-huang/openss7,kerr-huang/openss7,openss7/openss7