i965: Rename brw_gs{,_emit}.[ch] to brw_ff_gs{,_emit}.[ch].

The brw_gs.[ch] and brw_gs_emit.c source files contain code for
emulating fixed-function unit functionality (VF primitive decomposition
or SOL) using the GS unit.  They do not contain code to support proper
geometry shaders.

We've taken to calling that code "ff_gs" (see brw_ff_gs_prog_key,
brw_ff_gs_prog_data, brw_context::ff_gs, brw_ff_gs_compile,
brw_ff_gs_prog).  So it makes sense to make the filenames match.

Signed-off-by: Kenneth Graunke <kenneth@whitecape.org>
Acked-by: Matt Turner <mattst88@gmail.com>
Acked-by: Jason Ekstrand <jason.ekstrand@intel.com>
Acked-by: Iago Toral Quiroga <itoral@igalia.com>

src/mesa/drivers/dri/i965/Makefile.sources

@@ -50,6 +50,8 @@ i965_FILES = \
 	brw_eu_compact.c \
 	brw_eu_emit.c \
 	brw_eu_util.c \
+	brw_ff_gs.c \
+	brw_ff_gs_emit.c \
 	brw_fs.cpp \
 	brw_fs_channel_expressions.cpp \
 	brw_fs_copy_propagation.cpp \
@@ -65,8 +67,6 @@ i965_FILES = \
 	brw_fs_sel_peephole.cpp \
 	brw_fs_vector_splitting.cpp \
 	brw_fs_visitor.cpp \
-	brw_gs.c \
-	brw_gs_emit.c \
 	brw_gs_state.c \
 	brw_gs_surface_state.c \
 	brw_interpolation_map.c \

src/mesa/drivers/dri/i965/brw_ff_gs.c

@@ -41,7 +41,7 @@
 #include "brw_eu.h"
 #include "brw_util.h"
 #include "brw_state.h"
-#include "brw_gs.h"
+#include "brw_ff_gs.h"
 
 #include "util/ralloc.h"
 

src/mesa/drivers/dri/i965/brw_ff_gs_emit.c

@@ -40,7 +40,7 @@
 #include "brw_defines.h"
 #include "brw_context.h"
 #include "brw_eu.h"
-#include "brw_gs.h"
+#include "brw_ff_gs.h"
 
 /**
  * Allocate registers for GS.

src/mesa/drivers/dri/i965/brw_vec4_gs.c

@@ -31,7 +31,7 @@
 #include "brw_context.h"
 #include "brw_vec4_gs_visitor.h"
 #include "brw_state.h"
-#include "brw_gs.h"
+#include "brw_ff_gs.h"
 
 
 static bool