s390: convert ".insn" encoding to instruction names

With z10 as minimum supported machine generation many ".insn" encodings
could be now converted to instruction names. There are couple of exceptions
- stfle is used from the als code built for z900 and cannot be converted
- few ".insn" directives encode unsupported instruction formats

The generated code is identical before/after this change.

Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
Reviewed-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
diff --git a/arch/s390/mm/gmap.c b/arch/s390/mm/gmap.c
index a57224a..af03cac 100644
--- a/arch/s390/mm/gmap.c
+++ b/arch/s390/mm/gmap.c
@@ -1278,7 +1278,7 @@ static int gmap_protect_rmap(struct gmap *sg, unsigned long raddr,
 static inline void gmap_idte_one(unsigned long asce, unsigned long vaddr)
 {
 	asm volatile(
-		"	.insn	rrf,0xb98e0000,%0,%1,0,0"
+		"	idte	%0,0,%1"
 		: : "a" (asce), "a" (vaddr) : "cc", "memory");
 }