3rdparty: move to 3rdparty/blobs

There's now room for other repositories under 3rdparty.

Change-Id: I51b02d8bf46b5b9f3f8a59341090346dca7fa355
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Reviewed-on: http://review.coreboot.org/10109
Tested-by: build bot (Jenkins)
Reviewed-by: Stefan Reinauer <stefan.reinauer@coreboot.org>
diff --git a/src/northbridge/intel/sandybridge/Kconfig b/src/northbridge/intel/sandybridge/Kconfig
index 29e5d8c..fc6d6a4 100644
--- a/src/northbridge/intel/sandybridge/Kconfig
+++ b/src/northbridge/intel/sandybridge/Kconfig
@@ -105,7 +105,7 @@
 config MRC_FILE
 	string "Intel System Agent path and filename"
 	depends on HAVE_MRC
-	default "blobs/northbridge/intel/sandybridge/systemagent-r6.bin"
+	default "3rdparty/blobs/northbridge/intel/sandybridge/systemagent-r6.bin"
 	help
 	  The path and filename of the file to use as System Agent
 	  binary.