BaseTools/GenFds/Capsule: move function logic

BaseTools/GenFds/Capsule: move function logic

Move PackRegistryFormatGuid logic from Common.Misc to this file.
There were no other consumers of the function.
As it is one line, just replace the logic without the separate function.

v2 - change to fix the import statement

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