LoongArch: Fix "-mexplict-relocs=none -mcmodel=medium" producing %call36 when...

LoongArch: Fix "-mexplict-relocs=none -mcmodel=medium" producing %call36 when the assembler does not support it

Even if !HAVE_AS_SUPPORT_CALL36, const_call_insn_operand should still
return false when -mexplict-relocs=none -mcmodel=medium to make
loongarch_legitimize_call_address emit la.local or la.global.

gcc/ChangeLog:

	* config/loongarch/predicates.md (const_call_insn_operand):
	Remove buggy "HAVE_AS_SUPPORT_CALL36" conditions.  Change "1" to
	"true" to make the coding style consistent.

gcc/config/loongarch/predicates.md

@@ -444,21 +444,19 @@
     case SYMBOL_PCREL:
       if (TARGET_CMODEL_EXTREME
 	  || (TARGET_CMODEL_MEDIUM
-	      && HAVE_AS_SUPPORT_CALL36
 	      && (la_opt_explicit_relocs == EXPLICIT_RELOCS_NONE)))
 	return false;
       else
-	return 1;
+	return true;
 
     case SYMBOL_GOT_DISP:
       if (TARGET_CMODEL_EXTREME
 	  || !flag_plt
 	  || (flag_plt && TARGET_CMODEL_MEDIUM
-	      && HAVE_AS_SUPPORT_CALL36
 	      && (la_opt_explicit_relocs == EXPLICIT_RELOCS_NONE)))
 	return false;
       else
-	return 1;
+	return true;
 
     default:
       return false;