gallium/util: remove empty file u_half.h

Acked-by: Pierre-Eric Pelloux-Prayer <pierre-eric.pelloux-prayer@amd.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6774>

src/gallium/drivers/etnaviv/etnaviv_blend.c

@@ -32,7 +32,7 @@
 #include "hw/common.xml.h"
 #include "pipe/p_defines.h"
 #include "util/u_memory.h"
-#include "util/u_half.h"
+#include "util/half_float.h"
 
 void *
 etna_blend_state_create(struct pipe_context *pctx,

src/gallium/drivers/etnaviv/etnaviv_compiler_nir.c

@@ -42,7 +42,7 @@
 #include "compiler/nir/nir_builder.h"
 
 #include "tgsi/tgsi_strings.h"
-#include "util/u_half.h"
+#include "util/half_float.h"
 
 static bool
 etna_alu_to_scalar_filter_cb(const nir_instr *instr, const void *data)

src/gallium/drivers/etnaviv/etnaviv_disasm.c

@@ -34,7 +34,7 @@
 
 #include "hw/isa.xml.h"
 #include "util/u_math.h"
-#include "util/u_half.h"
+#include "util/half_float.h"
 
 struct instr {
    /* dword0: */

src/gallium/drivers/etnaviv/etnaviv_zsa.c

@@ -29,7 +29,7 @@
 #include "etnaviv_context.h"
 #include "etnaviv_screen.h"
 #include "etnaviv_translate.h"
-#include "util/u_half.h"
+#include "util/half_float.h"
 #include "util/u_memory.h"
 
 #include "hw/common.xml.h"