crypto: x86/aesni - update docs for aesni-intel module

Update the kconfig help and module description to reflect that VAES
instructions are now used in some cases.  Also fix XTR => XCTR.
Signed-off-by: Eric Biggers <ebiggers@google.com>
Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

arch/x86/crypto/Kconfig

@@ -14,7 +14,7 @@ config CRYPTO_CURVE25519_X86
 	  - ADX (large integer arithmetic)
 
 config CRYPTO_AES_NI_INTEL
-	tristate "Ciphers: AES, modes: ECB, CBC, CTS, CTR, XTR, XTS, GCM (AES-NI)"
+	tristate "Ciphers: AES, modes: ECB, CBC, CTS, CTR, XCTR, XTS, GCM (AES-NI/VAES)"
 	depends on X86
 	select CRYPTO_AEAD
 	select CRYPTO_LIB_AES
@@ -25,10 +25,14 @@ config CRYPTO_AES_NI_INTEL
 	help
 	  Block cipher: AES cipher algorithms
 	  AEAD cipher: AES with GCM
-	  Length-preserving ciphers: AES with ECB, CBC, CTS, CTR, XTR, XTS
+	  Length-preserving ciphers: AES with ECB, CBC, CTS, CTR, XCTR, XTS
 
 	  Architecture: x86 (32-bit and 64-bit) using:
 	  - AES-NI (AES new instructions)
+	  - VAES (Vector AES)
+
+	  Some algorithm implementations are supported only in 64-bit builds,
+	  and some have additional prerequisites such as AVX2 or AVX512.
 
 config CRYPTO_BLOWFISH_X86_64
 	tristate "Ciphers: Blowfish, modes: ECB, CBC"

arch/x86/crypto/aesni-intel_glue.c

@@ -1750,6 +1750,6 @@ static void __exit aesni_exit(void)
 late_initcall(aesni_init);
 module_exit(aesni_exit);
 
-MODULE_DESCRIPTION("Rijndael (AES) Cipher Algorithm, Intel AES-NI instructions optimized");
+MODULE_DESCRIPTION("AES cipher and modes, optimized with AES-NI or VAES instructions");
 MODULE_LICENSE("GPL");
 MODULE_ALIAS_CRYPTO("aes");