radeonsi: shorten si_pipe_* prefixes to si_*

This was the original naming convention in r600g and it somehow crept
into radeonsi.

Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c
index 9b70a35..2fc1632 100644
--- a/src/gallium/drivers/radeonsi/si_shader.c
+++ b/src/gallium/drivers/radeonsi/si_shader.c
@@ -2723,12 +2723,12 @@
 	return r;
 }
 
-int si_pipe_shader_create(
+int si_shader_create(
 	struct pipe_context *ctx,
 	struct si_shader *shader)
 {
 	struct si_context *sctx = (struct si_context*)ctx;
-	struct si_pipe_shader_selector *sel = shader->selector;
+	struct si_shader_selector *sel = shader->selector;
 	struct si_shader_context si_shader_ctx;
 	struct tgsi_shader_info shader_info;
 	struct lp_build_tgsi_context * bld_base;
@@ -2897,7 +2897,7 @@
 	return r;
 }
 
-void si_pipe_shader_destroy(struct pipe_context *ctx, struct si_shader *shader)
+void si_shader_destroy(struct pipe_context *ctx, struct si_shader *shader)
 {
 	r600_resource_reference(&shader->bo, NULL);
 }