Signed-off-by: ZYH <lymz@foxmail.com>

When compiling C code containing statements like this:
rt_base_t xx_io_tbl[] =
{
   GET_PIN(A,0),
};
the compiler will report:
Warning: #1296-D: extended constant initialiser used

Signed-off-by: chenyong <1521761801@qq.com>

1. 引入 #3062 '[bsp][Kconfig]在bsp的Kconfig中select组件初始化与user main的选项'所做的修改至本BSP包
2. 删去原rtconfig.h中非必要及无意义的配置，包括sensor,pwm,uart3,dma.

1. Add "drv_eth.c" for all imxrt platforms.
2. Add ksz8081 phy driver for imxrt1052-nxp-evk board.
3. Disable the LED demo in main.c file if enable the ENET
   and ksz8081 phy, because the PINs of LED and ksz8081
   reset are from the same GPIO.
4. Update the relevant Kconfig and Sconscript files.
Signed-off-by: NGavin Liu <gavin-liugang@outlook.com>

Add ramfs (8MB size) support for imxrt1052-nxp-evk board.
Signed-off-by: NGavin Liu <gavin-liugang@outlook.com>

1. Add sdram item in bsp/imxrt/imxrt1052-nxp-evk/board/Kconfig
2. Add sdram configuration header file for imxrt1052-nxp-evk
3. Update the sdram space assignment for memheap
Signed-off-by: NGavin Liu <gavin-liugang@outlook.com>

Add LPUART3 item in imxrt1052-nxp-evk Kconfig file to support
Arduino UART interface.
Signed-off-by: NGavin Liu <gavin-liugang@outlook.com>