Revert "ANDROID: x86: Remove a useless warning message"

This reverts commit 1f1098e0a3.

Signed-off-by: Matthias Maennich <maennich@google.com>

arch/x86/include/asm/cpufeature.h

@@ -154,6 +154,9 @@ extern void clear_cpu_cap(struct cpuinfo_x86 *c, unsigned int bit);
  * Workaround for the sake of BPF compilation which utilizes kernel
  * headers, but clang does not support ASM GOTO and fails the build.
  */
+#ifndef __BPF_TRACING__
+#warning "Compiler lacks ASM_GOTO support. Add -D __BPF_TRACING__ to your compiler arguments"
+#endif
 
 #define static_cpu_has(bit)            boot_cpu_has(bit)