drm/radeon/kms: change evergreen_default_state table from global to static

evergreen_default_state and evergreen_default_size are only
used in evergreen.c. Single file symbols should be static.
So move their definitions to evergreen_blit_shaders.h
and change their storage-class-specifier to static.

Remove unneeded evergreen_blit_shader.c

evergreen_ps/vs definitions were removed with
commit 4f8629675800 ("drm/radeon/kms: remove r6xx+ blit copy routines")
So their declarations in evergreen_blit_shader.h
are not needed, so remove them.

Signed-off-by: Tom Rix <trix@redhat.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drm/radeon/kms: add drm blit support for evergreen

This patch implements blit support for bo moves using
the 3D engine. It uses the same method as r6xx/r7xx:
- store the base state in an IB
- emit variable state and vertex buffers to do the blit

This allows the hw to move bos using the 3D engine and allows
full use of vram beyond the pci aperture size.

Signed-off-by: Alex Deucher <alexdeucher@gmail.com>
Signed-off-by: Dave Airlie <airlied@redhat.com>