svga: rename svga_surface_copy() to svga_resource_copy_region()
svga: rename svga_surface_copy() to svga_resource_copy_region()

To be consistent with the pipe_context function name.

Reviewed-by: Charmaine Lee <67ce69700661ea856134ddb10419a330e5f037d7@vmware.com>

metora/MesaGLSLCompiler,metora/MesaGLSLCompiler,metora/MesaGLSLCompiler