s390: Increment PC-relative relocation count for PC24DBL relocs

Commit fb798c50b2c8 added the R_390_PC24DBL relocation.  Due to a copy
and paste error it messed up to increment the PC-relative relocation
count in elf64-s390.c function elf_s390_check_relocs (i.e. duplicate
check for R_390_PC16DBL).

Found while inspecting and cleaning up differences between elf32-s390.c
and elf64-s390.c.

bfd/
	* elf64-s390.c (elf_s390_check_relocs): Increment PC-relative
	relocation count for R_390_PC24DBL.

Fixes: fb798c50b2c8
Signed-off-by: Jens Remus <jremus@linux.ibm.com>

bfd/elf64-s390.c

diff --git a/bfd/elf64-s390.c b/bfd/elf64-s390.c
index 2508769..f72df9f 100644
--- a/bfd/elf64-s390.c
+++ b/bfd/elf64-s390.c
@@ -1325,7 +1325,7 @@
 	      if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
 		  || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL
 		  || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
-		  || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
+		  || ELF64_R_TYPE (rel->r_info) == R_390_PC24DBL
 		  || ELF64_R_TYPE (rel->r_info) == R_390_PC32
 		  || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
 		  || ELF64_R_TYPE (rel->r_info) == R_390_PC64)