blackfin: Disable CONFIG_CC_OPTIMIZE_LIBS_FOR_SPEED in some cases

The boards do not link for me due to exceeding their size constrains, change
the config so they fit again.

Cc: Sonic Zhang <sonic.adi@gmail.com>
Signed-off-by: Tom Rini <trini@konsulko.com>
Signed-off-by: Sonic Zhang <sonic.zhang@analog.com>

configs/bct-brettl2_defconfig

@@ -2,4 +2,3 @@ CONFIG_BLACKFIN=y
 CONFIG_TARGET_BCT_BRETTL2=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_NET_RANDOM_ETHADDR=y
-CONFIG_CC_OPTIMIZE_LIBS_FOR_SPEED=y

configs/bf526-ezbrd_defconfig

@@ -3,4 +3,3 @@ CONFIG_TARGET_BF526_EZBRD=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_SPI_FLASH=y
-CONFIG_CC_OPTIMIZE_LIBS_FOR_SPEED=y

configs/bf527-ezkit-v2_defconfig

@@ -3,5 +3,4 @@ CONFIG_TARGET_BF527_EZKIT=y
 CONFIG_SYS_EXTRA_OPTIONS="BF527_EZKIT_REV_2_1"
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_SPI_FLASH=y
-CONFIG_CC_OPTIMIZE_LIBS_FOR_SPEED=y
 CONFIG_LIB_RAND=y

configs/bf527-ezkit_defconfig

@@ -3,5 +3,4 @@ CONFIG_TARGET_BF527_EZKIT=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_SPI_FLASH=y
-CONFIG_CC_OPTIMIZE_LIBS_FOR_SPEED=y
 CONFIG_NET_TFTP_VARS=n

configs/bf537-stamp_defconfig

@@ -3,4 +3,3 @@ CONFIG_TARGET_BF537_STAMP=y
 # CONFIG_CMD_SETEXPR is not set
 CONFIG_NET_RANDOM_ETHADDR=y
 CONFIG_SPI_FLASH=y
-CONFIG_CC_OPTIMIZE_LIBS_FOR_SPEED=y

configs/bf538f-ezkit_defconfig

@@ -1,6 +1,5 @@
 CONFIG_BLACKFIN=y
 CONFIG_TARGET_BF538F_EZKIT=y
 # CONFIG_CMD_SETEXPR is not set
-CONFIG_CC_OPTIMIZE_LIBS_FOR_SPEED=y
 # CONFIG_REGEX is not set
 CONFIG_LIB_RAND=y