x86: Disable CONFIG_X86_DECODER_SELFTEST in allmod/allyesconfigs

It can take some time to validate the image, make sure
{allyes|allmod}config doesn't enable it.

I'd say randconfig will cover it often enough, and the failure is also
borderline build coverage related: you cannot really make the decoder
test fail via source level changes, only with changes in the build
environment, so I agree with Andi that we can disable this one too.

Signed-off-by: Ingo Molnar <mingo@kernel.org>
Acked-by: Paul Gortmaker paul.gortmaker@windriver.com>
Suggested-and-acked-by: Andi Kleen andi@firstfloor.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

arch/x86/Kconfig.debug

@@ -184,6 +184,7 @@ config HAVE_MMIOTRACE_SUPPORT
 config X86_DECODER_SELFTEST
 	bool "x86 instruction decoder selftest"
 	depends on DEBUG_KERNEL && KPROBES
+	depends on !COMPILE_TEST
 	---help---
 	 Perform x86 instruction decoder selftests at build time.
 	 This option is useful for checking the sanity of x86 instruction