OptionRomPkg: Corrected path for the FtdiUsbSerialDxe.inf in OptionRomPkg.dsc

Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Ashley DeSimone <ashley.e.desimone@intel.com>


git-svn-id: https://svn.code.sf.net/p/edk2/code/trunk/edk2@14821 6f19259b-4bc3-4df7-8a09-765794883524