BaseTools/LzmaCompress: Fix the option "d" dictionary size

BaseTools/LzmaCompress: Fix the option "d" dictionary size

The range of dictionary size is set from [0,30] to [0,27].
And update the help information for this.
The previous logic for processing the parameter dict size is incorrect.
Now fix the logic.
The option "d" is added at 6b80310f34199d1f62e45e40fa902734735091fa.
(https://bugzilla.tianocore.org/show_bug.cgi?id=2077)

Cc: Bob Feng <bob.c.feng@intel.com>
Cc: Liming Gao <liming.gao@intel.com>
Signed-off-by: Shenglei Zhang <shenglei.zhang@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>