target/arm: Store VTCR_EL2, VSTCR_EL2 registers as uint64_t

target/arm: Store VTCR_EL2, VSTCR_EL2 registers as uint64_t

Change the representation of the VSTCR_EL2 and VTCR_EL2 registers in
the CPU state struct from struct TCR to uint64_t.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20220714132303.1287193-6-peter.maydell@linaro.org