Restore the initial value of $stap and $mstatus after test translate

Signed-off-by: liangzhen <zhen.liang@spacemit.com>

debug/gdbserver.py

@@ -1671,13 +1671,18 @@ def test_translation(self):
         self.gdb.b("error")
         self.gdb.b("handle_trap")
         self.gdb.b("main:active")
+        satp=self.gdb.p("$satp")
+        mstatus=self.gdb.p("$mstatus")
 
         output = self.gdb.c()
         assertRegex(output, r"\bmain\b")
         assertEqual(0xdeadbeef, self.gdb.p("physical[0]"))
         assertEqual(0x55667788, self.gdb.p("physical[1]"))
         assertEqual(0xdeadbeef, self.gdb.p("virtual[0]"))
         assertEqual(0x55667788, self.gdb.p("virtual[1]"))
+        # restore $satp $mstatus
+        self.gdb.p(f"$satp=0x{satp:x}")
+        self.gdb.p(f"$mstatus=0x{mstatus:x}")
 
 SATP_MODE_OFF = 0
 SATP_MODE_SV32 = 1