x86 VSDO: Fix Kconfig help

COMPAT_VDSO has 2 help text blocks, but kconfig only uses the
last one found, so merge the 2 blocks.

It would be real nice if kconfig would warn about this.
Signed-off-by: Randy Dunlap <randy.dunlap@oracle.com>
LKML-Reference: <4AF9FB6C.70003@oracle.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

arch/x86/Kconfig

@@ -1602,7 +1602,7 @@ config COMPAT_VDSO
 	depends on X86_32 || IA32_EMULATION
 	---help---
 	  Map the 32-bit VDSO to the predictable old-style address too.
-	---help---
+
 	  Say N here if you are running a sufficiently recent glibc
 	  version (2.3.3 or later), to remove the high-mapped
 	  VDSO mapping and to exclusively use the randomized VDSO.