[U-Boot] env_nand malloc not released

[Derek Ou]

Hi, all,

In the common/env_nand.c, function env_relocate_spec (for 
CONFIG_ENV_OFFSET_REDUND) malloc two memory areas in line 296 and 297.  
If it hits line 308 when both environment areas not found, it will 
return without freeing the two memory areas.  Is this a bug or I am 
missing something?

Thanks,
Derek