i965: Enabled the OES_copy_image extension on Gen 7 GPUs
OES_copy_image extension was disabled on Gen7 due to the lack of support
for ETC2 images. Enabled it back. (Kenneth Graunke)
v2:
- Removed the blank lines in the comments above OES_copy_image and
OES_texture_view extensions in intel_extensions.c (Nanley Chery)
Reviewed-by:
Nanley Chery <nanley.g.chery@intel.com>