arm: dts: Update nand node for bcmbca board dts

Update bcmbca dts to current nand node naming convention.

Changes in v2:
- Removed addition of nand-on-flash-bbt parameter

Signed-off-by: david regan <dregan@broadcom.com>
Reviewed-by: William Zhang <william.zhang@broadcom.com>
Reviewed-by: Anand Gore <anand.gore@broadcom.com>
3 files changed