block: constify partition prober array

The array is never modified so it can be const.
Reported-by: kernel test robot <lkp@intel.com>
Closes: https://lore.kernel.org/oe-kbuild-all/202304191640.SkNk7kVN-lkp@intel.com/Signed-off-by: Thomas Weißschuh <linux@weissschuh.net>
Link: https://lore.kernel.org/r/20230419-const-partition-v3-1-4e14e48be367@weissschuh.netSigned-off-by: Jens Axboe <axboe@kernel.dk>

block/partitions/core.c

@@ -12,7 +12,7 @@
 #include <linux/raid/detect.h>
 #include "check.h"
 
-static int (*check_part[])(struct parsed_partitions *) = {
+static int (*const check_part[])(struct parsed_partitions *) = {
 	/*
 	 * Probe partition formats with tables at disk address 0
 	 * that also have an ADFS boot block at 0xdc0.