Blackfin: fix BF522/BF523 max VCO mixup

The BF522 and BF523 had their real max VCO values swapped.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index 6040aad..8d6b5ae 100644
--- a/arch/blackfin/Kconfig
+++ b/arch/blackfin/Kconfig
@@ -574,8 +574,8 @@
 	default 400000000 if BF514
 	default 400000000 if BF516
 	default 400000000 if BF518
-	default 600000000 if BF522
-	default 400000000 if BF523
+	default 400000000 if BF522
+	default 600000000 if BF523
 	default 400000000 if BF524
 	default 600000000 if BF525
 	default 400000000 if BF526