spmi: pmic-arb: disable ACC bit only when all irqs are disabled

The current driver disables/enables the ACC bit when any interrupt
in that peripheral is being masked or unmasked.
However, the ACC bits were meant to be disabled and enabled when
all interrupts in that peripheral are disabled and any interrupts in
it are enabled respt.
The driver ends up masking the peripheral (i.e.  all the interrupts
in that peripheral) if any one interrupt in that peripheral is masked.
There could be other interrupts enabled which will not trigger after this.

Fix this by changing the driver to disable or enable when all the
interrupts in the peripheral are disabled or when the first enable of an
interrupt in that peripheral happens.

Note that we will need to keep track of the enabled interrupts for an
apid. There are other things like ppid and owner information tracked per
apid. Introduce a per apid structure to track all the three.

Change-Id: I256546a7a4683a463beb6d0eb360a0edd4e5c11d
Signed-off-by: Abhijeet Dharmapurikar <adharmap@codeaurora.org>
[collinsd: fix merge conflict]
Signed-off-by: David Collins <collinsd@codeaurora.org>