UPSTREAM: soc/intel/common/block: Add Intel common UART code

Create Intel Common UART driver code. This code does
below UART configuration for bootblock phase.

* Program BAR
* Configure reset register
* Configure clock register

BUG=none
BRANCH=none
TEST=none

Change-Id: Iba752e0a751c1eb37f68a401d237de21d0327dcd
Signed-off-by: Patrick Georgi <pgeorgi@chromium.org>
Original-Commit-Id: 01d75f4172e73fbcdc08ce0a13eaa0efb400ff12
Original-Change-Id: I3843fac88cfb7bbb405be50d69f555b274f0d72a
Original-Signed-off-by: Aamir Bohra <aamir.bohra@intel.com>
Original-Reviewed-on: https://review.coreboot.org/18952
Original-Tested-by: build bot (Jenkins)
Original-Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/475715
4 files changed