[bsp] Remove unnecessary files.

[net][lwip] add personalized RT-Thread sign into lwip protocol stack

Signed-off-by: Nliuxianliang <liuxianliang@rt-thread.com>

[BSP/stm32f427-robomaster-a] Correct RAM configuration information

[DeviceDriver][IPC] Fix rbb free bug in rt_rbb_destroy.

Delay until

Signed-off-by: Nliuxianliang <liuxianliang@rt-thread.com>

[Kernel] Fix the signal compiling issue when using minilibc

[drivers/spi_flash_sfud] accept the error from spi read or write in spi_write_read function.

Signed-off-by: Nliuxianliang <liuxianliang@rt-thread.com>

MIPS Base Code Refine v1

[Util] fix the dependence of file feature in ymodem

LS1C selfboot feature have been rewiritten, and we changed
bare boot base to 0x80000000 to better utilize memory.
Signed-off-by: NJiaxun Yang <jiaxun.yang@flygoat.com>

[kernel] code and comments cleanup

[components]: utilities: ymodem: Add ymodem send protocol and ry_sy application.

Use "ry" to receive files and use "sy file_path" to
send files. Default console uart and you can choose
any other uart if you want.
Signed-off-by: NSteven Liu <steven.liu@rock-chips.com>

add stm32l4r5-st-nucleo BSP

[bsp][stm32] fix the hardware timer issue

sync

This bsp is used for test MIPS base code in simutator,
implemented basic MIPS cpuport and serial port driver.
Signed-off-by: NJiaxun Yang <jiaxun.yang@flygoat.com>

Previously Loongson 1B and Loongson 1C have their own libcpu
implemention, but they're almost identical. So we merge them
into gs232 and adapt to new common code.
Signed-off-by: NJiaxun Yang <jiaxun.yang@flygoat.com>

MIPS common code was highly duplicated, This commit
is a attempt to clean-up and refine these code.

The context and exception handle flow is mostly identical
with Linux, but a notable difference is that when FPU enabled,
we save FP registers in stackframe unconditionally.
Signed-off-by: NJiaxun Yang <jiaxun.yang@flygoat.com>

[bsp/stm32] update eclipse project.

[BSP] move libcpu/mips/x1000 to bsp/x1000/cpu