2.6.30 add missing config symbol

SVN-Revision: 16909

target/linux/generic-2.6/config-2.6.30

@@ -175,6 +175,7 @@ CONFIG_BINFMT_ELF=y
 CONFIG_BLK_DEV_INITRD=y
 # CONFIG_BLK_DEV_INTEGRITY is not set
 # CONFIG_BLK_DEV_IO_TRACE is not set
+# CONFIG_BLK_DEV_IT8172 is not set
 # CONFIG_BLK_DEV_IT8213 is not set
 # CONFIG_BLK_DEV_IT821X is not set
 # CONFIG_BLK_DEV_JMICRON is not set