ArmVirtPkg: switch to new PL011UartLib implementation

Switch to the new, cleaned up PL011UartLib implementation so we will
be able to remove the old one.

Contributed-under: TianoCore Contribution Agreement 1.1
Signed-off-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Reviewed-by: Leif Lindholm <leif.lindholm@linaro.org>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>

ArmVirtPkg/Library/FdtPL011SerialPortLib/FdtPL011SerialPortLib.c

@@ -20,6 +20,7 @@
 #include <Base.h>
 
 #include <Library/PcdLib.h>
+#include <Library/PL011UartLib.h>
 #include <Library/SerialPortLib.h>
 #include <Pi/PiBootMode.h>
 #include <Uefi/UefiBaseType.h>
@@ -28,8 +29,6 @@
 #include <Library/HobLib.h>
 #include <Guid/EarlyPL011BaseAddress.h>
 
-#include <Drivers/PL011Uart.h>
-
 STATIC UINTN mSerialBaseAddress;
 
 RETURN_STATUS