c-sky: Remove now superfluous sentinel element from ctl_talbe array

This commit comes at the tail end of a greater effort to remove the
empty elements at the end of the ctl_table arrays (sentinels) which
will reduce the overall build time size of the kernel and run time
memory bloat by ~64 bytes per sentinel (further information Link :
https://lore.kernel.org/all/[e-mail]/)

Remove sentinel from alignment_tbl ctl_table array. This removal is safe
because register_sysctl_init implicitly uses ARRAY_SIZE() in addition to
checking for the sentinel.

Acked-by: Guo Ren <[e-mail]>
Signed-off-by: Joel Granados <[e-mail]>
Signed-off-by: Luis Chamberlain <[e-mail]>

arch/csky/abiv1/alignment.c

···
 		.mode = 0666,
 		.proc_handler = &proc_dointvec
 	},
-	{}
 };
 
 static int __init csky_alignment_init(void)