target/arm: Mark up VNCR offsets (offsets 0x100..0x160)

target/arm: Mark up VNCR offsets (offsets 0x100..0x160)

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 commit covers offsets 0x100 to 0x160.

Many (but not all) of the registers in this range have _EL12 aliases,
and the slot in memory is shared between the _EL12 version of the
register and the _EL1 version.  Where we programmatically generate
the regdef for the _EL12 register, arrange that its
nv2_redirect_offset is set up correctly to do this.

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>