Revert "ANDROID: GKI: spmi: pmic-arb: don't enable SPMI_MSM_PMIC_ARB by default"

This reverts commit 3f2debd7. This
should instead be just removed using the gki_defconfig.

Signed-off-by: Will McVicker <willmcvicker@google.com>
Bug: 142896904
Bug: 143712741
Change-Id: Ib32c9b7cee0e62d344d0bfd48064a2578d0251f9