[U-Boot] [PATCH v3 5/6] env: make env default selective, check and apply

Change the syntax (user API) for env default: -f: override write-once variables var... : accept individual variable(s) -a: all (resetting the whole env is NOT the default behavior) Enable variable checking and make changes effective by enabling do_apply argument to himport_r().

Re: [U-Boot] [PATCH v3 5/6] env: make env default selective, check and apply

Dear Gerlando Falauto, Change the syntax (user API) for env default: -f: override write-once variables var... : accept individual variable(s) -a: all (resetting the whole env is NOT the default behavior) Looks fine. Enable variable checking and make changes effective by enabling