Bug in hal_fsmc.h

[sabdulqadir]

First of all,
Thanks to @barthess, @fpoussin, and everyone else who contributed to providing NAND flash driver.
I recently tried moving from 18.2.0 to 20.3.2 and had following issues:

1. For ChibiOS-Contrib/os/hal/include/hal_fsmc.h:37 => needs to include stm32f7x targets

2. Also line324 on the same file has a typo "STM32_NAND_USE_NAND1" instead of "STM32_NAND_USE_NAND2"

3. Should dmaStreamAlloc(nandp->dma, be=> nandp->dma = dmaStreamAlloc(STM32_NAND_DMA_STREAM,

If you guys deem it suitable, I can make these changes and do a pull request.

Thanks,
AQ

ChibiOS version: 20.3.2
Compiler: arm-none-eabi-gcc (7-2018-q2-update)(7.3.1)
Platform and board:STM32F723ZE (custom board)
Nature of the problem: Cannot compile
Failure mode: n/a

[fpoussin]

Hi @sabdulqadir, feel free to send in a pull request, that would help us.
Thanks!