IntelFsp2Pkg: BaseFspSwitchStackLib Support for X64

REF:https://bugzilla.tianocore.org/show_bug.cgi?id=3832
Add BaseFspSwitchStackLib Support for X64.

Cc: Chasel Chiu <chasel.chiu@intel.com>
Cc: Nate DeSimone <nathaniel.l.desimone@intel.com>
Cc: Star Zeng <star.zeng@intel.com>
Cc: Ashraf Ali S <ashraf.ali.s@intel.com>
Signed-off-by: Ted Kuo <ted.kuo@intel.com>
Reviewed-by: Chasel Chiu <chasel.chiu@intel.com>

IntelFsp2Pkg/Include/PushPopRegsNasm.inc

@@ -0,0 +1,67 @@
+;------------------------------------------------------------------------------
+;
+; Copyright (c) 2022, Intel Corporation. All rights reserved.<BR>
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;
+; Abstract:
+;
+;   Provide macro to push/pop registers in X64
+;
+;------------------------------------------------------------------------------
+
+;-----------------------------------------------------------------------------
+;  Macro:        PUSHA_64
+;
+;  Description:  Saves all registers on stack
+;
+;  Input:        None
+;
+;  Output:       None
+;-----------------------------------------------------------------------------
+%macro PUSHA_64   0
+  push    r8
+  push    r9
+  push    r10
+  push    r11
+  push    r12
+  push    r13
+  push    r14
+  push    r15
+  push    rax
+  push    rcx
+  push    rdx
+  push    rbx
+  push    rsp
+  push    rbp
+  push    rsi
+  push    rdi
+%endmacro
+
+;-----------------------------------------------------------------------------
+;  Macro:        POPA_64
+;
+;  Description:  Restores all registers from stack
+;
+;  Input:        None
+;
+;  Output:       None
+;-----------------------------------------------------------------------------
+%macro POPA_64   0
+  pop    rdi
+  pop    rsi
+  pop    rbp
+  pop    rsp
+  pop    rbx
+  pop    rdx
+  pop    rcx
+  pop    rax
+  pop    r15
+  pop    r14
+  pop    r13
+  pop    r12
+  pop    r11
+  pop    r10
+  pop    r9
+  pop    r8
+%endmacro
+