mesa: Remove unnecessary parameters from TexImage

mesa: Remove unnecessary parameters from TexImage

gl_texture_image structure always holds size and internal format before
TexImage driver hook is called. Those passing same information in
function parameters only duplicates information making the interface
harder to understand.

Signed-off-by: Pauli Nieminen <pauli.nieminen@linux.intel.com>
Reviewed-by: Brian Paul <brianp@vmware.com>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>