blackfin: Kconfig: fix ROM range for bf60x

ROM range of bf60x is above 0xb0000000.

Signed-off-by: Bob Liu <lliubbo@gmail.com>
diff --git a/arch/blackfin/Kconfig b/arch/blackfin/Kconfig
index f9f6f69..7e3a24c 100644
--- a/arch/blackfin/Kconfig
+++ b/arch/blackfin/Kconfig
@@ -404,8 +404,9 @@
 	hex "Kernel ROM Base"
 	depends on ROMKERNEL
 	default "0x20040040"
-	range 0x20000000 0x20400000 if !(BF54x || BF561)
+	range 0x20000000 0x20400000 if !(BF54x || BF561 || BF60x)
 	range 0x20000000 0x30000000 if (BF54x || BF561)
+	range 0xB0000000 0xC0000000 if (BF60x)
 	help
 	  Make sure your ROM base does not include any file-header
 	  information that is prepended to the kernel.