Revert "ARM: dts: msm: disable SPMI debug bus for sdm845v1"

This reverts commit 36050187 ("ARM: dts: msm: disable SPMI
debug bus for sdm845v1").  The SPMI PMIC arbiter debug bus is
no longer needed for a workaround on SDM845v1 boards.  Therefore,
enable it for software usage.

Change-Id: I0db7125c86519d0552346988554702e841f1c38a
Signed-off-by: David Collins <collinsd@codeaurora.org>