modes/asm/ghash-armv4.pl: address "infixes are deprecated" warnings.

Reviewed-by: NRich Salz <rsalz@openssl.org>
(Merged from https://github.com/openssl/openssl/pull/6615)

crypto/modes/asm/ghash-armv4.pl

@@ -145,6 +145,8 @@ $code=<<___;
 .text
 #if defined(__thumb2__) || defined(__clang__)
 .syntax	unified
+#define ldrplb  ldrbpl
+#define ldrneb  ldrbne
 #endif
 #if defined(__thumb2__)
 .thumb
@@ -152,11 +154,6 @@ $code=<<___;
 .code	32
 #endif
 
-#ifdef  __clang__
-#define ldrplb  ldrbpl
-#define ldrneb  ldrbne
-#endif
-
 .type	rem_4bit,%object
 .align	5
 rem_4bit: