s390/expoline: use __ALIGN instead of open coded .align

Use __ALIGN instead of open coded .align statement to make sure that
external expoline thunks follow global function alignment rules.
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>

arch/s390/include/asm/nospec-insn.h

@@ -2,6 +2,7 @@
 #ifndef _ASM_S390_NOSPEC_ASM_H
 #define _ASM_S390_NOSPEC_ASM_H
 
+#include <linux/linkage.h>
 #include <asm/dwarf.h>
 
 #ifdef __ASSEMBLY__
@@ -16,7 +17,7 @@
 	.macro __THUNK_PROLOG_NAME name
 #ifdef CONFIG_EXPOLINE_EXTERN
 	.pushsection .text,"ax",@progbits
-	.align 16,0x07
+	__ALIGN
 #else
 	.pushsection .text.\name,"axG",@progbits,\name,comdat
 #endif