ARM: davinci: Fix trivial spelling

The word 'descriptor' is misspelled throughout the tree.

Fix it up accordingly:
    decriptors -> descriptors
Reviewed-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Signed-off-by: Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>
[nsekhar@ti.com: fixed up subject prefix]
Signed-off-by: Sekhar Nori <nsekhar@ti.com>

arch/arm/mach-davinci/board-da830-evm.c

@@ -266,7 +266,7 @@ static struct mtd_partition da830_evm_nand_partitions[] = {
 	}
 };
 
-/* flash bbt decriptors */
+/* flash bbt descriptors */
 static uint8_t da830_evm_nand_bbt_pattern[] = { 'B', 'b', 't', '0' };
 static uint8_t da830_evm_nand_mirror_pattern[] = { '1', 't', 'b', 'B' };