Add missing configuration symbol on CONFIG_INPUT_IXP4XX_BEEPER

SVN-Revision: 13578

target/linux/ixp4xx/config-default

@@ -149,6 +149,7 @@ CONFIG_I2C_GPIO=y
 # CONFIG_IDE is not set
 CONFIG_INITRAMFS_SOURCE=""
 CONFIG_INPUT=m
+# CONFIG_INPUT_IXP4XX_BEEPER is not set
 # CONFIG_IP6_NF_MANGLE is not set
 # CONFIG_IP6_NF_MATCH_EUI64 is not set
 # CONFIG_IP6_NF_MATCH_FRAG is not set