lavapipe: fix depth bias offset flag enables.
When vulkan enables depth bias, enable it for all 3 prim types in gallium.
This fixes: dEQP-VK.draw.renderpass.depth_bias.depth_bias_*
Cc: mesa-stable
When vulkan enables depth bias, enable it for all 3 prim types in gallium.
This fixes: dEQP-VK.draw.renderpass.depth_bias.depth_bias_*
Cc: mesa-stable