[APL] Add config option for XDCI mode

This patch allows a board to configure XDCI mode.
By default, keep XDCI mode as PCI mode which is default value in FSP.
The mode can be controlled by Config Data.
- Silicon Setting > Device Enable/Disable > Control 2 > Enable XDCI

If XDCI mode needs to be overrided, put new value in .dlt(delta) file.
- DEV_EN_CFG_DATA.DevEnControl2.XdciEnable | 0x0 (Disabled)
- DEV_EN_CFG_DATA.DevEnControl2.XdciEnable | 0x2 (ACPI mode)

It will fix #397 with the override value in a delta file.

Signed-off-by: Aiden Park <aiden.park@intel.com>

Platform/ApollolakeBoardPkg/CfgData/CfgData_DeviceEnable.dsc

@@ -12,6 +12,6 @@
   # !HDR EMBED:{DEV_EN_CFG_DATA:TAG_320:START}
 
   #                            CTRL0      CTRL1     CTRL2
-  # !BSF SUBT:{DEV_EN_TMPL: 0x15555555  : 0x07FF  : 0x3FFF }
+  # !BSF SUBT:{DEV_EN_TMPL: 0x15555555  : 0x07FF  : 0x7FFF }
 
   # !HDR EMBED:{DEV_EN_CFG_DATA:TAG_320:END}

Platform/ApollolakeBoardPkg/CfgData/Template_DeviceEnable.dsc

@@ -202,8 +202,12 @@
       # !BSF HELP:{Enable/disable USB3 port 5. 0x01(Default).}
       # !BSF FIELD:{Usb30Port5Enable:1bW}
 
+      # !BSF NAME:{Enable XDCI} TYPE:{Combo} OPTION:{0: Disabled, 1: PCI Mode, 2: ACPI Mode}
+      # !BSF HELP:{Enable/disable XDCI. 0:Disabled, 1:PCI Mode(Default), 2:ACPI Mode.}
+      # !BSF FIELD:{XdciEnable:2b}
+
       # !BSF NAME:{Reserved} TYPE:{Reserved}
       # !BSF HELP:{Control 2 reserved}
-      # !BSF FIELD:{Rsvd:2b}
+      # !BSF FIELD:{Rsvd:0b}
 
   # !BSF DEFT:{DEV_EN_TMPL:END}

Platform/ApollolakeBoardPkg/Library/Stage2BoardInitLib/Stage2BoardInitLib.c

@@ -908,6 +908,7 @@ UpdateFspConfig (
   }
 
   FspsConfig->Usb30Mode                   = 1;
+  FspsConfig->UsbOtg                      = (UINT8)DevEnCfgData->DevEnControl2.XdciEnable;
 
   if (DCI_DBG_FEATURE_ENABLED() ) {
     FspsConfig->DciEn = 1;