s390/disassembler: fix decoding of risblg instruction

Fix typo: risblk -> risblg.
Signed-off-by: NHeiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: NMartin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/kernel/dis.c

@@ -334,7 +334,7 @@ static char *long_insn_name[] = {
 	[LONG_INSN_LLGHRL] = "llghrl",
 	[LONG_INSN_POPCNT] = "popcnt",
 	[LONG_INSN_RISBHG] = "risbhg",
-	[LONG_INSN_RISBLG] = "risblk",
+	[LONG_INSN_RISBLG] = "risblg",
 	[LONG_INSN_RINEXT] = "rinext",
 	[LONG_INSN_RIEMIT] = "riemit",
 	[LONG_INSN_TABORT] = "tabort",