CONFIG_CRYPTO_SHA1_PPC is not available for the selected architecture x86.
Result is shown for architecture powerpc

Hash functions: SHA-1

modulename: sha1-powerpc.ko

configname: CONFIG_CRYPTO_SHA1_PPC

Linux Kernel Configuration
└─>Accelerated Cryptographic Algorithms for CPU (powerpc)
└─>Hash functions: SHA-1
In linux kernel since version 3.1 (release Date: 2011-10-24)
SHA-1 secure hash algorithm (FIPS 180)

Architecture: powerpc
source code:
/arch/powerpc/crypto/
depends
CONFIG_PPC