PcAtChipsetPkg: Clean up source files

1. Do not use tab characters
2. No trailing white space in one line
3. All files must end with CRLF

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Liming Gao <liming.gao@intel.com>
Reviewed-by: Ruiyu Ni <ruiyu.ni@intel.com>

PcAtChipsetPkg/HpetTimerDxe/HpetTimerDxe.inf

@@ -1,14 +1,14 @@
 ## @file
 # Timer Architectural Protocol module using High Precesion Event Timer (HPET).
 #
-# Copyright (c) 2011 - 2015, Intel Corporation. All rights reserved.<BR>
-# This program and the accompanying materials                          
-# are licensed and made available under the terms and conditions of the BSD License         
-# which accompanies this distribution.  The full text of the license may be found at        
-# http://opensource.org/licenses/bsd-license.php                                            
-#                                                                                           
-# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,                     
-# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.             
+# Copyright (c) 2011 - 2018, Intel Corporation. All rights reserved.<BR>
+# This program and the accompanying materials
+# are licensed and made available under the terms and conditions of the BSD License
+# which accompanies this distribution.  The full text of the license may be found at
+# http://opensource.org/licenses/bsd-license.php
+#
+# THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
+# WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 #
 ##
 
@@ -30,12 +30,12 @@
 
 [Sources]
   HpetTimer.c
-  
+
 [Packages]
   MdePkg/MdePkg.dec
   UefiCpuPkg/UefiCpuPkg.dec
   PcAtChipsetPkg/PcAtChipsetPkg.dec
-  
+
 [LibraryClasses]
   PcdLib
   IoLib