x86, perf: Fix the dependency of the x86 insn decoder selftest

Since x86 instruction decoder is not only for kprobes,
it should be tested when the insn.c is compiled.
(e.g. perf is enabled but kprobes is disabled)
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Fixes: cbe5c34c ("x86: Compile insn.c and inat.c only for KPROBES")
Signed-off-by: Ingo Molnar <mingo@kernel.org>

arch/x86/Kconfig.debug

@@ -171,7 +171,7 @@ config HAVE_MMIOTRACE_SUPPORT
 
 config X86_DECODER_SELFTEST
 	bool "x86 instruction decoder selftest"
-	depends on DEBUG_KERNEL && KPROBES
+	depends on DEBUG_KERNEL && INSTRUCTION_DECODER
 	depends on !COMPILE_TEST
 	---help---
 	 Perform x86 instruction decoder selftests at build time.