powerpc/configs: Drop no longer needed CONFIG_CRYPTO_SHA256

Since commit 826775bb ("crypto: drbg - Add select on sha256") we
no longer need to set CONFIG_CRYPTO_SHA256 in our defconfigs.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

arch/powerpc/configs/44x/eiger_defconfig

@@ -91,7 +91,6 @@ CONFIG_CRYPTO_XCBC=y
 CONFIG_CRYPTO_MD4=y
 CONFIG_CRYPTO_MD5=y
 CONFIG_CRYPTO_SHA1=y
-CONFIG_CRYPTO_SHA256=y
 CONFIG_CRYPTO_SHA512=y
 CONFIG_CRYPTO_ARC4=y
 CONFIG_CRYPTO_BLOWFISH=y

arch/powerpc/configs/44x/redwood_defconfig

@@ -90,7 +90,6 @@ CONFIG_CRYPTO_XCBC=y
 CONFIG_CRYPTO_MD4=y
 CONFIG_CRYPTO_MD5=y
 CONFIG_CRYPTO_SHA1=y
-CONFIG_CRYPTO_SHA256=y
 CONFIG_CRYPTO_SHA512=y
 CONFIG_CRYPTO_ARC4=y
 CONFIG_CRYPTO_BLOWFISH=y

arch/powerpc/configs/mpc83xx_defconfig

@@ -108,6 +108,5 @@ CONFIG_ROOT_NFS=y
 CONFIG_CRC_T10DIF=y
 CONFIG_CRYPTO_ECB=m
 CONFIG_CRYPTO_PCBC=m
-CONFIG_CRYPTO_SHA256=y
 CONFIG_CRYPTO_SHA512=y
 CONFIG_CRYPTO_DEV_TALITOS=y

arch/powerpc/configs/pasemi_defconfig

@@ -173,6 +173,5 @@ CONFIG_DETECT_HUNG_TASK=y
 CONFIG_XMON=y
 CONFIG_XMON_DEFAULT=y
 CONFIG_CRYPTO_MD4=y
-CONFIG_CRYPTO_SHA256=y
 CONFIG_CRYPTO_SHA512=y
 CONFIG_CRYPTO_BLOWFISH=y