drm/i915/perf: Add 'render basic' Gen8+ OA unit configs

Adds a static OA unit, MUX, B Counter + Flex EU configurations for basic
render metrics on Broadwell, Cherryview, Skylake and Broxton. These are
auto generated from an XML description of metric sets, currently
maintained in gputop, ref:

 https://github.com/rib/gputop
 > gputop-data/oa-*.xml
 > scripts/i915-perf-kernelgen.py

 $ make -C gputop-data -f Makefile.xml WHITELIST=RenderBasic

v2: add newlines to debug messages + fix comment (Matthew Auld)

Signed-off-by: Robert Bragg <robert@sixbynine.org>
Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin@intel.com>
Reviewed-by: Matthew Auld <matthew.auld@intel.com>
Signed-off-by: Ben Widawsky <ben@bwidawsk.net>

drivers/gpu/drm/i915/Makefile

@@ -129,7 +129,13 @@ i915-y += i915_vgpu.o
 
 # perf code
 i915-y += i915_perf.o \
-	  i915_oa_hsw.o
+	  i915_oa_hsw.o \
+	  i915_oa_bdw.o \
+	  i915_oa_chv.o \
+	  i915_oa_sklgt2.o \
+	  i915_oa_sklgt3.o \
+	  i915_oa_sklgt4.o \
+	  i915_oa_bxt.o
 
 ifeq ($(CONFIG_DRM_I915_GVT),y)
 i915-y += intel_gvt.o

drivers/gpu/drm/i915/i915_drv.h

@@ -2417,12 +2417,14 @@ struct drm_i915_private {
 
 			int metrics_set;
 
-			const struct i915_oa_reg *mux_regs[1];
-			int mux_regs_lens[1];
+			const struct i915_oa_reg *mux_regs[2];
+			int mux_regs_lens[2];
 			int n_mux_configs;
 
 			const struct i915_oa_reg *b_counter_regs;
 			int b_counter_regs_len;
+			const struct i915_oa_reg *flex_regs;
+			int flex_regs_len;
 
 			struct {
 				struct i915_vma *vma;