ArmPlatformPkg: list module-internal header files in INF [Sources]

The BaseTools build feature introduced for TianoCore#1804 / in commit
1fa6699e6c ("BaseTools: Add a checking for Sources section in INF file",
2019-06-10) logs some (non-fatal) warnings about unlisted internal header
files. List those files explicitly.

Note: header files are added in lexicographical order only if the
underlying INF file already keeps the [Sources] and [LibraryClasses]
sections in lexicographical order. Otherwise, header files are added in
rough "logical" order.

Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Leif Lindholm <leif.lindholm@linaro.org>
Signed-off-by: Laszlo Ersek <lersek@redhat.com>
Reviewed-by: Philippe Mathieu-Daude <philmd@redhat.com>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>

ArmPlatformPkg/Drivers/NorFlashDxe/NorFlashDxe.inf

@@ -17,6 +17,7 @@
   ENTRY_POINT                    = NorFlashInitialise
 
 [Sources.common]
+  NorFlashDxe.h
   NorFlashDxe.c
   NorFlashFvbDxe.c
   NorFlashBlockIoDxe.c

ArmPlatformPkg/Library/PL031RealTimeClockLib/PL031RealTimeClockLib.inf

@@ -17,6 +17,7 @@
   LIBRARY_CLASS                  = RealTimeClockLib|DXE_RUNTIME_DRIVER
 
 [Sources.common]
+  PL031RealTimeClock.h
   PL031RealTimeClockLib.c
 
 [Packages]

ArmPlatformPkg/PrePeiCore/PrePeiCoreMPCore.inf

@@ -16,6 +16,7 @@
 
 [Sources.common]
   MainMPCore.c
+  PrePeiCore.h
   PrePeiCore.c
 
 [Sources.ARM]

ArmPlatformPkg/PrePeiCore/PrePeiCoreUniCore.inf

@@ -15,6 +15,7 @@
   VERSION_STRING                 = 1.0
 
 [Sources.common]
+  PrePeiCore.h
   PrePeiCore.c
   MainUniCore.c