BaseTools: Correct PcdArray value assigment statement

https://bugzilla.tianocore.org/show_bug.cgi?id=1410
BaseTools should not generate C structure array initial value
if the value is not specified with CODE style.

This patch is going to remove the incorrect initial value statement
and correct the Pcd Array value assignment statement.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Bob Feng <bob.c.feng@intel.com>
Reviewed-by: Liming Gao <liming.gao@intel.com>