[COMMITTED 2.36] io: Fix F_GETLK, F_SETLK, and F_SETLKW for powerpc64

[Adhemerval Zanella <adhemerval.zanella@linaro.org>]

Different than other 64 bit architectures, powerpc64 defines the
LFS POSIX lock constants  with values similar to 32 ABI, which
are meant to be used with fcntl64 syscall.  Since powerpc64 kABI
does not have fcntl, the constants are adjusted with the
FCNTL_ADJUST_CMD macro.

The 4d0fe291aed3a476a changed the logic of generic constants
LFS value are equal to the default values; which is now wrong
for powerpc64.

Fix the value by explicit define the previous glibc constants
(powerpc64 does not need to use the 32 kABI value, but it simplifies
the FCNTL_ADJUST_CMD which should be kept as compatibility).

Checked on powerpc64-linux-gnu and powerpc-linux-gnu.

(cherry picked from commit 5f828ff824e3b7cd133ef905b8ae25ab8a8f3d66)
---
 sysdeps/unix/sysv/linux/powerpc/bits/fcntl.h | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/sysdeps/unix/sysv/linux/powerpc/bits/fcntl.h b/sysdeps/unix/sysv/linux/powerpc/bits/fcntl.h
index d7cf158b33..49c8fac0fb 100644
--- a/sysdeps/unix/sysv/linux/powerpc/bits/fcntl.h
+++ b/sysdeps/unix/sysv/linux/powerpc/bits/fcntl.h
@@ -33,6 +33,12 @@
 # define __O_LARGEFILE	0200000
 #endif
 
+#if __WORDSIZE == 64
+# define F_GETLK	5
+# define F_SETLK	6
+# define F_SETLKW	7
+#endif
+
 struct flock
   {
     short int l_type;	/* Type of lock: F_RDLCK, F_WRLCK, or F_UNLCK.	*/
-- 
2.34.1