x86/mm: Re-enable DEBUG_TLBFLUSH for X86_32

CONFIG_INVLPG got removed in commit
094ab1db7cb7833cd4c820acd868fc26acf3f08e ("x86, 386 removal:
Remove CONFIG_INVLPG").

That commit left one instance of CONFIG_INVLPG untouched, effectively
disabling DEBUG_TLBFLUSH for X86_32. Since all currently supported
x86 CPUs should now be able to support that option, just drop the entire
sub-dependency.

Signed-off-by: Paul Bolle <pebolle@tiscali.nl>
Link: http://lkml.kernel.org/r/1363262077.1335.71.camel@x61.thuisdomein
Signed-off-by: Ingo Molnar <mingo@kernel.org>
diff --git a/arch/x86/Kconfig.debug b/arch/x86/Kconfig.debug
index b322f12..16f7383 100644
--- a/arch/x86/Kconfig.debug
+++ b/arch/x86/Kconfig.debug
@@ -131,7 +131,7 @@
 
 config DEBUG_TLBFLUSH
 	bool "Set upper limit of TLB entries to flush one-by-one"
-	depends on DEBUG_KERNEL && (X86_64 || X86_INVLPG)
+	depends on DEBUG_KERNEL
 	---help---
 
 	X86-only for now.