edac: Only build sb_edac on 64-bit

The sb_edac driver is marginally useful on a 32-bit kernel, and
currently has 64-bit divide compile errors when building that config.
For now, make this build on only for 64-bit kernels.

Signed-off-by: Josh Boyer <jwboyer@redhat.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/edac/Kconfig

@@ -214,7 +214,7 @@ config EDAC_I7300
 
 config EDAC_SBRIDGE
 	tristate "Intel Sandy-Bridge Integrated MC"
-	depends on EDAC_MM_EDAC && PCI && X86 && X86_MCE_INTEL
+	depends on EDAC_MM_EDAC && PCI && X86_64 && X86_MCE_INTEL
 	depends on EXPERIMENTAL
 	help
 	  Support for error detection and correction the Intel