md/md-llbitmap: Remove unneeded semicolon

Remove unnecessary semicolons reported by Coccinelle/coccicheck and the
semantic patch at scripts/coccinelle/misc/semicolon.cocci.

Link: https://lore.kernel.org/linux-raid/20250910091912.25624-1-nichen@iscas.ac.cn
Signed-off-by: Chen Ni <nichen@iscas.ac.cn>
Signed-off-by: Yu Kuai <yukuai@fnnas.com>

drivers/md/md-llbitmap.c

@@ -378,7 +378,7 @@ static void llbitmap_infect_dirty_bits(struct llbitmap *llbitmap,
 		case BitClean:
 			pctl->state[pos] = BitDirty;
 			break;
-		};
+		}
 	}
 }