x86_32: use asm-generic/scatterlist.h

Cc: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 5bdc143..5dc5421 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -110,7 +110,7 @@
        def_bool (X86_64 || DMAR || DMA_API_DEBUG)
 
 config NEED_SG_DMA_LENGTH
-	def_bool X86_64
+	def_bool y
 
 config GENERIC_ISA_DMA
 	def_bool y