atomics/treewide: Remove redundant atomic_inc_not_zero() definitions

When atomic_inc_not_zero(v) isn't defined, <linux/atomic.h> will define
it as falling back to atomic_add_unless((v), 1, 0), so there's no need
for arch code to do so.

There should be no functional change as a result of this patch.

Signed-off-by: Mark Rutland <[e-mail]>
Reviewed-by: Will Deacon <[e-mail]>
Acked-by: Peter Zijlstra (Intel) <[e-mail]>
Acked-by: Palmer Dabbelt <[e-mail]>
Cc: Boqun Feng <[e-mail]>
Cc: Linus Torvalds <[e-mail]>
Cc: Thomas Gleixner <[e-mail]>
Link: https://lore.kernel.org/lkml/[e-mail]
Signed-off-by: Ingo Molnar <[e-mail]>

arch/arc/include/asm/atomic.h

···
 	c;								\
 })
 
-#define atomic_inc_not_zero(v)		atomic_add_unless((v), 1, 0)
-
 #define atomic_inc(v)			atomic_add(1, v)
 #define atomic_dec(v)			atomic_sub(1, v)
 

arch/hexagon/include/asm/atomic.h

···
 	return __oldval;
 }
 
-#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0)
-
 #define atomic_inc(v) atomic_add(1, (v))
 #define atomic_dec(v) atomic_sub(1, (v))
 

arch/riscv/include/asm/atomic.h

···
 }
 #endif
 
-/*
- * The extra atomic operations that are constructed from one of the core
- * LR/SC-based operations above.
- */
-static __always_inline int atomic_inc_not_zero(atomic_t *v)
-{
-        return atomic_fetch_add_unless(v, 1, 0);
-}
-
 #ifndef CONFIG_GENERIC_ATOMIC64
 static __always_inline long atomic64_inc_not_zero(atomic64_t *v)
 {