powerpc/spufs: remove orphan declarations from spufs.h

Remove the following orphan declarations from spufs.h:
1. spufs_coredump_calls has been removed since
commit 48cad41f ("[POWERPC] spufs: Combine
spufs_coredump_calls with spufs_calls").

2. spufs_coredump_num_notes has been removed since
commit 936d5bf1 ("[POWERPC] spufs: Get rid of spufs_coredump_num_notes,
it's not needed if we NULL terminate").
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20220913075029.682327-3-cuigaosheng1@huawei.com

arch/powerpc/platforms/cell/spufs/spufs.h

@@ -333,7 +333,6 @@ void spufs_stop_callback(struct spu *spu, int irq);
 void spufs_mfc_callback(struct spu *spu);
 void spufs_dma_callback(struct spu *spu, int type);
 
-extern struct spu_coredump_calls spufs_coredump_calls;
 struct spufs_coredump_reader {
 	char *name;
 	ssize_t (*dump)(struct spu_context *ctx, struct coredump_params *cprm);
@@ -341,7 +340,6 @@ struct spufs_coredump_reader {
 	size_t size;
 };
 extern const struct spufs_coredump_reader spufs_coredump_read[];
-extern int spufs_coredump_num_notes;
 
 extern int spu_init_csa(struct spu_state *csa);
 extern void spu_fini_csa(struct spu_state *csa);