asm-generic: Drop renameat syscall from default list

The newer renameat2 syscall provides all the functionality provided by
the renameat syscall and adds flags, so future architectures won't need
to include renameat.

Therefore drop the renameat syscall from the generic syscall list unless
__ARCH_WANT_RENAMEAT is defined by the architecture's unistd.h prior to
including asm-generic/unistd.h, and adjust all architectures using the
generic syscall list to define it so that no in-tree architectures are
affected.

Signed-off-by: James Hogan <[email protected]>
Acked-by: Vineet Gupta <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Catalin Marinas <[email protected]>
Cc: Will Deacon <[email protected]>
Cc: [email protected]
Cc: Mark Salter <[email protected]>
Cc: Aurelien Jacquiot <[email protected]>
Cc: [email protected]
Cc: Richard Kuo <[email protected]>
Cc: [email protected]
Cc: [email protected]
Cc: Jonas Bonn <[email protected]>
Cc: [email protected]
Cc: Chen Liqin <[email protected]>
Cc: Lennox Wu <[email protected]>
Cc: Chris Metcalf <[email protected]>
Cc: Guan Xuetao <[email protected]>
Cc: Ley Foon Tan <[email protected]>
Cc: [email protected]
Cc: Yoshinori Sato <[email protected]>
Cc: [email protected]
Signed-off-by: Arnd Bergmann <[email protected]>

arch/hexagon/include/uapi/asm/unistd.h

@@ -27,6 +27,7 @@
  */
 
 #define sys_mmap2 sys_mmap_pgoff
+#define __ARCH_WANT_RENAMEAT
 #define __ARCH_WANT_SYS_EXECVE
 #define __ARCH_WANT_SYS_CLONE
 #define __ARCH_WANT_SYS_VFORK