edac: add support for Calxeda highbank L2 cache ecc

Add support for L2 ECC on Calxeda highbank platform.

Signed-off-by: Rob Herring <rob.herring@calxeda.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>

drivers/edac/Kconfig

@@ -309,4 +309,11 @@ config EDAC_HIGHBANK_MC
 	  Support for error detection and correction on the
 	  Calxeda Highbank memory controller.
 
+config EDAC_HIGHBANK_L2
+	tristate "Highbank L2 Cache"
+	depends on EDAC_MM_EDAC && ARCH_HIGHBANK
+	help
+	  Support for error detection and correction on the
+	  Calxeda Highbank memory controller.
+
 endif # EDAC