Import QEMU patch files that have been accepted for upstream

[eblot]

Summary:
hw/arm: improve Aspeed Catalina BMC emulation

This series improves emulation of the Aspeed-based Catalina BMC machine,
mostly around its I2C buses: the GPIO expanders the board relies on and
the temperature sensors sitting next to them.

The bulk of the work is on the PCA95xx I/O expander models. The existing
PCA9552 and PCA9554 drivers only really covered the exact parts a couple
of boards happened to use, and some of their register and pin behaviour
did not match the datasheets. Catalina needs a few more variants and
expects them to act like the real chips, so:

• the PCA9552 driver now provides proper PCA9555/PCA9535 types, applies
  input polarity inversion on reads, and handles the command register
  as the datasheet describes (auto-increment and wrapping);

• the PCA9554 driver gains the 4-bit PCA9536 variant, reflects
  push-pull
  outputs back into the input register, and grows an opt-in mode that
  honours the configured pin direction instead of forcing pins to
  outputs;

• both drivers expose each line as a "pinN" QOM property, which lets an
  external actor drive an input pin. The property also allows reading
  the value driven onto an output-configured pin, which is the more
  useful capability, but nothing exercises it yet.

Along the way both models get a fair bit of cleanup (DEFINE_TYPES, the
Resettable interface, state moved out of the headers, default
descriptions derived from the instantiated type).

On the machine itself, Catalina now instantiates its PCA9555 expanders
as their own type, gains the NIC and FIO temperature sensors present on
real hardware, and drives the pca9554 expander input pins from outside
the guest.

Finally, the register-level behaviour of both expanders is covered by
new qtests.

Test Plan:
Run QEMU with a Catalina flash image:

./facebook/start-qemu --pkg-dir rebuild-docker -f .../flash-catalina

Reviewed By: ifel, jamesatha

Differential Revision: D114236127

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