linux-user: Remove ELF_HWCAP2

All definitions of ELF_HWCAP2 are now identical.  Provide a
not-reached stub as a fallback definition of get_elf_hwcap2.

Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>

linux-user/elfload.c

@@ -448,8 +448,6 @@ static bool init_guest_commpage(void)
     return true;
 }
 
-#define ELF_HWCAP2 get_elf_hwcap2(thread_cpu)
-
 #define ELF_PLATFORM get_elf_platform()
 
 static const char *get_elf_platform(void)
@@ -537,8 +535,6 @@ static void elf_core_copy_regs(target_elf_gregset_t *regs,
 #define USE_ELF_CORE_DUMP
 #define ELF_EXEC_PAGESIZE       4096
 
-#define ELF_HWCAP2  get_elf_hwcap2(thread_cpu)
-
 #if TARGET_BIG_ENDIAN
 # define VDSO_HEADER  "vdso-be.c.inc"
 #else
@@ -593,8 +589,6 @@ static inline void init_thread(struct target_pt_regs *regs,
 
 #define ELF_ARCH        EM_PPC
 
-#define ELF_HWCAP2 get_elf_hwcap2(thread_cpu)
-
 /*
  * The requirements here are:
  * - keep the final alignment of sp (sp & 0xf)
@@ -1279,6 +1273,10 @@ static inline void init_thread(struct target_pt_regs *regs,
 #ifndef HAVE_ELF_HWCAP
 abi_ulong get_elf_hwcap(CPUState *cs) { return 0; }
 #endif
+#ifndef HAVE_ELF_HWCAP2
+abi_ulong get_elf_hwcap2(CPUState *cs) { g_assert_not_reached(); }
+#define HAVE_ELF_HWCAP2 0
+#endif
 
 #include "elf.h"
 
@@ -1801,9 +1799,9 @@ static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
 #ifdef DLINFO_ARCH_ITEMS
     size += DLINFO_ARCH_ITEMS * 2;
 #endif
-#ifdef ELF_HWCAP2
-    size += 2;
-#endif
+    if (HAVE_ELF_HWCAP2) {
+        size += 2;
+    }
     info->auxv_len = size * n;
 
     size += envc + argc + 2;
@@ -1863,10 +1861,9 @@ static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc,
     NEW_AUX_ENT(AT_SECURE, (abi_ulong) qemu_getauxval(AT_SECURE));
     NEW_AUX_ENT(AT_EXECFN, info->file_string);
 
-#ifdef ELF_HWCAP2
-    NEW_AUX_ENT(AT_HWCAP2, (abi_ulong) ELF_HWCAP2);
-#endif
-
+    if (HAVE_ELF_HWCAP2) {
+        NEW_AUX_ENT(AT_HWCAP2, get_elf_hwcap(thread_cpu));
+    }
     if (u_base_platform) {
         NEW_AUX_ENT(AT_BASE_PLATFORM, u_base_platform);
     }