mesa: upgrade 21.2.5 -> 21.3.0

New features:
VK_EXT_color_write_enable on lavapipe
GL_ARB_texture_filter_anisotropic in llvmpipe
Anisotropic texture filtering in lavapipe
VK_EXT_shader_atomic_float2 on Intel and RADV.
VK_EXT_vertex_input_dynamic_state on RADV.
VK_KHR_timeline_semaphore on lavapipe
VK_EXT_external_memory_host on lavapipe
GL_AMD_pinned_memory on llvmpipe
GL 4.5 compatibility on llvmpipe
VK_EXT_primitive_topology_list_restart on RADV and lavapipe.
ES 3.2 on zink
VK_KHR_depth_stencil_resolve on lavapipe
VK_KHR_shader_integer_dot_product on RADV.
OpenGL FP16 support on llvmpipe
VK_KHR_shader_float16_int8 on lavapipe
VK_KHR_spirv_1_4 on lavapipe
Experimental raytracing support on RADV
VK_KHR_synchronization2 on Intel
NGG shader based culling is now enabled by default on GFX10.3 on RADV.
VK_KHR_maintenance4 on RADV
VK_KHR_format_feature_flags2 on RADV.
EGL_EXT_present_opaque on wayland

Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>