Remove __ARM_ARCH__ guard on gcm_*_v8.

OpenSSL's c1669e1c205dc8e695fb0c10a655f434e758b9f7 switched it to
__ARM_MAX_ARCH__, which we mirrored in assembly but not C. The C version
should be __ARM_MAX_ARCH__ to match. However, __ARM_MAX_ARCH__ is
hardcoded to 8, so just remove the check.

Change-Id: Ic873203db1478f49437b889b84ee7fb28eba1a6d
Reviewed-on: https://boringssl-review.googlesource.com/c/35045
Commit-Queue: Adam Langley <agl@google.com>
Reviewed-by: Adam Langley <agl@google.com>

crypto/fipsmodule/modes/internal.h

diff --git a/crypto/fipsmodule/modes/internal.h b/crypto/fipsmodule/modes/internal.h
index ed1160b..5f9d035 100644
--- a/crypto/fipsmodule/modes/internal.h
+++ b/crypto/fipsmodule/modes/internal.h
@@ -315,8 +315,6 @@
 #endif  // OPENSSL_X86
 
 #elif defined(OPENSSL_ARM) || defined(OPENSSL_AARCH64)
-#include <openssl/arm_arch.h>
-#if __ARM_ARCH__ >= 7
 #define GHASH_ASM_ARM
 #define GCM_FUNCREF_4BIT
 
@@ -352,7 +350,6 @@
 }
 #endif  // OPENSSL_ARM
 
-#endif  // __ARM_ARCH__ >= 7
 #elif defined(OPENSSL_PPC64LE)
 #define GHASH_ASM_PPC64LE
 #define GCM_FUNCREF_4BIT