[intel-i915] Improve dpll allocation

Share dplls when possible. Also, given that the sparse documentation on
HDPORT makes it difficult to be confident in how the feature is
handled, just ignore it for now. Support can be needed when something
actually needs it and better documentation is available.

Change-Id: I186de9959bd9f1e7521c3333abb306aae4acfaea

[intel-i915] Handle transcoder EDP and DPLL0

Change-Id: Idc68e8f6932b38c0b7929b81ea50c4bcd54e6a8f

[ddk][device] deprecate iotxn_queue op and device_iotxn_queue()

Most of this noise is due to various drivers that were not including
assert.h or limits.h (for PAGE_SIZE) or driver.h, instead counting on
getting them indirectly via iotxn.h via driver.h

Change-Id: Ib9d0cd56a2b81f45887e1eeb79c22b3fc44d72da

[ulib][hwreg] Add support for fluent setting

This was a requested feature for reducing visual clutter on
registers that have many fields to set.

Change-Id: I91cb550f841f08499e8900285d2375514691feb2

[dev][i915] Switch code over to hwreg lib

The hwreg code is derived from registers-base.h and has support for
additional features (like reserved-zero bits).

Change-Id: I1476a23de273896e029c99231833d30d4105e3cd

[system][intel-i915] Reset hardware when needed

Change-Id: I42a356ab099a6669e94d9fa49b8f92eaef38cdbe

[system][intel-i915] Add HDMI configuration

The bulk of this logic is disabled behind a #define flag.

Change-Id: I3240895203b71bfa4fc61f2a7df723bae55ede71