spmi: spmi-pmic-arb: Add support to set interrupt ownership

The MID_SEL register routes the interrupt to the configured MID.
On a multi-SOC system a PMIC interrupt may be assigned to
secondary SOC (on another MID). Make sure the interrupt gets
assigned to the right MID while registering for it.

Change-Id: I87cc890af051dbe8e1c81662800f1c39b50290da
Signed-off-by: Kiran Gunda <kgunda@codeaurora.org>