[FMV] Unify sha1, sha2. (#347)

According to ArmARM:

SHA2, bits [15:12]
0b0000 No SHA2 instructions implemented.
FEAT_SHA256 implements the functionality identified by the value 0b0001.
If the value of ID_AA64ISAR0_EL1.SHA1 is 0b0000, this field must have the value 0b0000.

SHA1, bits [11:8]
0b0000 No SHA1 instructions implemented.
FEAT_SHA1 implements the functionality identified by the value 0b0001.
If the value of ID_AA64ISAR0_EL1.SHA2 is 0b0000, this field must have the value 0b0000.

To my understanding this means you can't have one without the other.

Author: labrinea

main/acle.md

@@ -402,6 +402,7 @@ Armv8.4-A [[ARMARMv84]](#ARMARMv84). Support is added for the Dot Product intrin
   a misplaced anchor.
 * Added `__FUNCTION_MULTI_VERSIONING_SUPPORT_LEVEL` to indicate the support
   level of the [Function Multi Versioning](#function-multi-versioning).
+* Unified Function Multi Versioning features sha1, sha2.
 * Added [**Alpha**](#current-status-and-anticipated-changes)
   support for SME2.1 (FEAT_SME2p1).
 * Removed requirement to add preprocessor guards for header files.
@@ -2714,8 +2715,7 @@ The following table lists the architectures feature mapping for AArch64
    | 106           | `FEAT_SM3`, `FEAT_SM4`   | sm4           | ```ID_AA64ISAR0_EL1.SM4 >= 0b0001```      |
    | 108           | `FEAT_RDM`               | rdm, rdma     | ```ID_AA64ISAR0_EL1.RDM >= 0b0001```      |
    | 110           | `FEAT_CRC32`             | crc           | ```ID_AA64ISAR0_EL1.CRC32 >= 0b0001```    |
-   | 120           | `FEAT_SHA1`              | sha1          | ```ID_AA64ISAR0_EL1.SHA1 >= 0b0001```     |
-   | 130           | `FEAT_SHA256`            | sha2          | ```ID_AA64ISAR0_EL1.SHA2 >= 0b0001```     |
+   | 130           | `FEAT_SHA1`,`FEAT_SHA256`| sha2          | ```ID_AA64ISAR0_EL1.SHA2 >= 0b0001```     |
    | 140           | `FEAT_SHA512`,`FEAT_SHA3`| sha3          | ```ID_AA64ISAR0_EL1.SHA3 >= 0b0001```     |
    | 150           | `FEAT_AES`               | aes           | ```ID_AA64ISAR0_EL1.AES >= 0b0001```      |
    | 160           | `FEAT_PMULL`             | pmull         | ```ID_AA64ISAR0_EL1.AES >= 0b0010```      |