spmi: spmi-pmic-arb: add support for PMIC arbiter v8

spmi: spmi-pmic-arb: add support for PMIC arbiter v8

PMIC arbiter v8 supports up to 4 SPMI buses and up to 8192 PMIC
peripherals.  Its register map differs from v7 as several fields
increased in size. Add support for PMIC arbiter version 8.

Signed-off-by: David Collins <david.collins@oss.qualcomm.com>
Signed-off-by: Kamal Wadhwa <kamal.wadhwa@oss.qualcomm.com>
Signed-off-by: Jishnu Prakash <jishnu.prakash@oss.qualcomm.com>
Reviewed-by: Konrad Dybcio <konrad.dybcio@oss.qualcomm.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
Link: https://patch.msgid.link/20260123182039.224314-10-sboyd@kernel.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>