nvram: add usage() function
authorBangLang Huang <banglang.huang@foxmail.com>
Fri, 24 Feb 2017 02:45:16 +0000 (10:45 +0800)
committerAlexander Couzens <lynxis@fe80.eu>
Tue, 22 Aug 2017 12:31:32 +0000 (14:31 +0200)
commit2a253e7cdbacd1bd19da80ea6f35a93b42655c3b
tree2e7f66cdbb16c5d329d9ef523552974a3d1e5a1c
parent1948d8e08c72106a01b359a30217cf92657cc79d
nvram: add usage() function

Merge the help message into a single function,
so that we can use it somewhere else.

Signed-off-by: BangLang Huang <banglang.huang@foxmail.com>
package/utils/nvram/src/cli.c