target/tricore: Add CHECK_REG_PAIR() for insn accessing 64 bit regs

target/tricore: Add CHECK_REG_PAIR() for insn accessing 64 bit regs

some insns were not checking if an even index was used to access a 64
bit register. In the worst case that could lead to a buffer overflow as
reported in https://gitlab.com/qemu-project/qemu/-/issues/1698.

Reported-by: Siqi Chen <coc.cyqh@gmail.com>
Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Message-Id: <20230612113245.56667-4-kbastian@mail.uni-paderborn.de>
(cherry picked from commit 6991777ec4b2a344d47bddec62744bedd9883d78)
Signed-off-by: Michael Tokarev <mjt@tls.msk.ru>