x86/cpu/amd: Exclude 32bit only assembler from 64bit build

The "vide" inline assembler is only needed on 32bit kernels for old
32bit only CPUs.

Guard it with an #ifdef so it's not included in 64bit builds.
Signed-off-by: Andi Kleen <ak@linux.intel.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Link: https://lkml.kernel.org/r/20190330004743.29541-2-andi@firstfloor.org

arch/x86/kernel/cpu/amd.c

@@ -82,12 +82,14 @@ static inline int wrmsrl_amd_safe(unsigned msr, unsigned long long val)
  *	performance at the same time..
  */
 
+#ifdef CONFIG_X86_32
 extern __visible void vide(void);
 __asm__(".text\n"
 	".globl vide\n"
 	".type vide, @function\n"
 	".align 4\n"
 	"vide: ret\n");
+#endif
 
 static void init_amd_k5(struct cpuinfo_x86 *c)
 {