freedreno/registers: add missing varset="chip" for new enum values
Fixes: de8c769d ("freedreno/registers: add a7xx registers for drm/msm kernel driver")
Closes: #6788 (closed)
Fixes: de8c769d ("freedreno/registers: add a7xx registers for drm/msm kernel driver")
Closes: #6788 (closed)