crypto: crc32c - Kill pointless CRYPTO_CRC32C_X86_64 option

This bool option can never be set to anything other than y.  So
let's just kill it.
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

arch/x86/crypto/Makefile

@@ -52,5 +52,5 @@ aesni-intel-y := aesni-intel_asm.o aesni-intel_glue.o fpu.o
 ghash-clmulni-intel-y := ghash-clmulni-intel_asm.o ghash-clmulni-intel_glue.o
 sha1-ssse3-y := sha1_ssse3_asm.o sha1_ssse3_glue.o
 crc32c-intel-y := crc32c-intel_glue.o
-crc32c-intel-$(CONFIG_CRYPTO_CRC32C_X86_64) += crc32c-pcl-intel-asm_64.o
+crc32c-intel-$(CONFIG_64BIT) += crc32c-pcl-intel-asm_64.o
 crc32-pclmul-y := crc32-pclmul_asm.o crc32-pclmul_glue.o

crypto/Kconfig

@@ -322,19 +322,9 @@ config CRYPTO_CRC32C
 	  by iSCSI for header and data digests and by others.
 	  See Castagnoli93.  Module will be crc32c.
 
-config CRYPTO_CRC32C_X86_64
-	bool
-	depends on X86 && 64BIT
-	select CRYPTO_HASH
-	help
-	  In Intel processor with SSE4.2 supported, the processor will
-	  support CRC32C calculation using hardware accelerated CRC32
-	  instruction optimized with PCLMULQDQ instruction when available.
-
 config CRYPTO_CRC32C_INTEL
 	tristate "CRC32c INTEL hardware acceleration"
 	depends on X86
-	select CRYPTO_CRC32C_X86_64 if 64BIT
 	select CRYPTO_HASH
 	help
 	  In Intel processor with SSE4.2 supported, the processor will