[PATCH 1/2] docs: Correct a typo in platform_guide.md

[Xiang W]

在 2021-07-08星期四的 19:07 +0800，Bin Meng写道：
> It's riscv-pk, not riskv-pk.
> 
> Signed-off-by: Bin Meng <bmeng.cn at gmail.com>
Reviewed-by: Xiang W <wxjstz at 126.com>
> ---
> 
>  docs/platform_guide.md | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/docs/platform_guide.md b/docs/platform_guide.md
> index 7920fac..df90c6b 100644
> --- a/docs/platform_guide.md
> +++ b/docs/platform_guide.md
> @@ -17,7 +17,7 @@ the supported platforms. These firmwares are linked
> against *libplatsbi.a*.
>  Firmware binaries are installed in
>  *<install_directory>/platform/<platform_subdir>/bin*. These
> firmwares can be
>  used as executable runtime firmwares on the supported platforms as a
> replacement
> -for the legacy *riskv-pk* boot loader (BBL).
> +for the legacy *riscv-pk* boot loader (BBL).
>  
>  A complete doxygen-style documentation of *struct sbi_platform* and
> related
>  APIs is available in the file *include/sbi/sbi_platform.h*.
> -- 
> 2.25.1
> 
>