This feature was probably missed when adding FamilyAVR6, but should
definitely be there. I checked all four devices in the AVR6 family and
they all support eijmp/eicall.
Found while working on https://reviews.llvm.org/D137572.
Differential Revision: https://reviews.llvm.org/D137573
def FamilyAVR51 : Family<"avr51", [FamilyAVR5, FeatureELPM, FeatureELPMX]>;
-def FamilyAVR6 : Family<"avr6", [FamilyAVR51]>;
+def FamilyAVR6 : Family<"avr6", [FamilyAVR51, FeatureEIJMPCALL]>;
def FamilyTiny
: Family<"avrtiny",