insane.bbclass: Additional "mips" and "mipsel" machine definitions
Add "mips" and "mipsel" to "machdata" table.
Although there is a way to add entries to the "machdata" table
from a BSP without modifying the insane.bbclass directly, MIPS is
already supported in poky and as such the relevant entries should be
present in insane.bbclass.
Signed-off-by: Juro Bystricky <juro.bystricky@intel.com> Signed-off-by: Ross Burton <ross.burton@intel.com>
