turn on kernel size optimization

SVN-Revision: 16110

target/linux/rb532/config-2.6.28

@@ -17,6 +17,7 @@ CONFIG_BASE_SMALL=0
 CONFIG_BITREVERSE=y
 CONFIG_BLK_DEV_SD=y
 CONFIG_BOOT_RAW=y
+CONFIG_CC_OPTIMIZE_FOR_SIZE=y
 CONFIG_CEVT_R4K=y
 CONFIG_CLASSIC_RCU=y
 # CONFIG_CPU_BIG_ENDIAN is not set