We've earlier added support to split the register address space into TM
and SROT regions. Split up the regmap address space into two for msm8998
that has a similar register layout.

The order is important (TM before SROT) because we make an assumption
that SROT is always the second address space in order to support legacy
DTs.
Signed-off-by: Amit Kucheria <amit.kucheria@linaro.org>
Signed-off-by: Andy Gross <agross@kernel.org>