powerpc/configs: Drop no longer needed CONFIG_CRYPTO_ECB

Since commit 12cb3a1c ("crypto: xts - Add ECB dependency") we no
longer need to set CONFIG_CRYPTO_ECB in our defconfigs.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/configs/44x/eiger_defconfig

@@ -84,7 +84,6 @@ CONFIG_CRYPTO_CCM=y
 CONFIG_CRYPTO_GCM=y
 CONFIG_CRYPTO_CBC=y
 CONFIG_CRYPTO_CTS=y
-CONFIG_CRYPTO_ECB=y
 CONFIG_CRYPTO_LRW=y
 CONFIG_CRYPTO_PCBC=y
 CONFIG_CRYPTO_XTS=y

arch/powerpc/configs/44x/redwood_defconfig

@@ -83,7 +83,6 @@ CONFIG_CRYPTO_CCM=y
 CONFIG_CRYPTO_GCM=y
 CONFIG_CRYPTO_CBC=y
 CONFIG_CRYPTO_CTS=y
-CONFIG_CRYPTO_ECB=y
 CONFIG_CRYPTO_LRW=y
 CONFIG_CRYPTO_PCBC=y
 CONFIG_CRYPTO_XTS=y