- Maintainers information is now corrected.
- Withdraw the modification on EXEC_PATH of the gcc toolchain.

fix indentataions

- Multi-Port & Adjustable Buadrate of UART controller feature added.

use space instead of table for indentation in ls2k_ram.lds

from ls2k user manuanl know that GPIO0_I is input, GPIO1_I is reserved.
here typo error, fix it.

rtc driver can not configured through Kconfig

attach probe of the oscilloscope too the
3.3v & PWM3 like below:

          jack
    ------|  |---|    |-|    |----
    |o o 3.3v    |eth1| |eth0|
    |o o
    |o o
    |o o PWM3
    |o o

type commands below to rt-thread console:
    msh /> pwm_enable pwm0 3
    msh /> pwm_set pwm0 3 140 90

turn off pwm:
    msh /> pwm_disable pwm0 3
Signed-off-by: NDu Huanpeng <548708880@qq.com>

hardware date format
  year, the same as ctime
  month 1 ~ 12
  no leap second
Signed-off-by: NDu Huanpeng <548708880@qq.com>

Signed-off-by: NDu Huanpeng <548708880@qq.com>

Signed-off-by: Nduhuanpeng <548708880@qq.com>