ShellPkg/AcpiView: PrintFormatter for FADT Flags field

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=3839

Adds PrintFormatter function to the FADT flags field.
Prints indivisual flag name along with flag value.

Cc: Ray Ni <ray.ni@intel.com>
Cc: Zhichao Gao <zhichao.gao@intel.com>
Cc: Sami Mujawar <sami.mujawar@arm.com>
Signed-off-by: Abdul Lateef Attar <abdattar@amd.com>
Reviewed-by: Zhichao Gao <zhichao.gao@intel.com>

ShellPkg/Library/UefiShellAcpiViewCommandLib/AcpiParser.c

@@ -884,7 +884,7 @@ ParseAcpiBitFields (
     }
 
     // extract Bitfield data for the current item
-    Data = (BitsData >> Parser[Index].Offset) & ~(~0ULL << Parser[Index].Length);
+    Data = RShiftU64 (BitsData, Parser[Index].Offset) & ~(LShiftU64 (~0ULL, Parser[Index].Length));
 
     if (Trace) {
       // if there is a Formatter function let the function handle