C3: add env to support mtd partition [1/1]

PD#SWPL-176740

Problem:
env support mtd partition

Solution:
env support mtd partition

Verify:
C3

Change-Id: Iaac7f2e815b4a49c7a7a261f00c1c48b59b4b312
Signed-off-by: jingsong.yao <jingsong.yao@amlogic.com>
1 file changed