x86: x86 CORE_DUMP_USE_REGSET

This switches x86 to the user_regset-based code for ELF core dumps.
The core dumps come out exactly the same as before.

Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>

include/asm-x86/elf.h

@@ -201,6 +201,7 @@ extern int vdso_enabled;
 
 #endif /* !CONFIG_X86_32 */
 
+#define CORE_DUMP_USE_REGSET
 #define USE_ELF_CORE_DUMP
 #define ELF_EXEC_PAGESIZE	4096