shader_enums: Move MAX_DRAW_BUFFERS to this file.

We include shader_enums.h from freedreno's compiler for both GL and
Vulkan, and the main/config.h include resulted in polluting the
namespace with things like MAX_VIEWPORTS that other Vulkan drivers use
as their driver-specific maximums.

Reviewed-by: Kristian H. Kristensen <hoegsberg@google.com>
2 files changed