target/arm: Mark up VNCR offsets (offsets >= 0x200, except GIC)

target/arm: Mark up VNCR offsets (offsets >= 0x200, except GIC)

Mark up the cpreginfo structs to indicate offsets for system
registers from VNCR_EL2, as defined in table D8-66 in rule R_CSRPQ in
the Arm ARM.  This covers all the remaining offsets at 0x200 and
above, except for the GIC ICH_* registers.

(Note that because we don't implement FEAT_SPE, FEAT_TRF,
FEAT_MPAM, FEAT_BRBE or FEAT_AMUv1p1 we don't implement any
of the registers that use offsets at 0x800 and above.)

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Tested-by: Miguel Luis <miguel.luis@oracle.com>