mapi: generate correct dispatch for EXT_draw_instanced
These APIs can be exposed in GLES2.0 via EXT_draw_instanced, they were incorrectly being stuck on GLES 3.0 only.
Fixes piglit ext_draw_instanced-drawarrays
Closes #5798 (closed)
These APIs can be exposed in GLES2.0 via EXT_draw_instanced, they were incorrectly being stuck on GLES 3.0 only.
Fixes piglit ext_draw_instanced-drawarrays
Closes #5798 (closed)