nb/intel/sandybridge: Drop iommu.c and rename functions

* Move the contents of iommu.c to early_init.c.
* Name the functions like done in intel/soc/common.
* Move PAMx register setup to own function

Preparations for integration in soc/intel/common/*

Tested on Lenovo T520 (Intel Sandy Bridge).
Still boots to OS, no errors visible in dmesg.

Change-Id: I3ec395bf6722bceb84316e92733dcfcd7a093639
Signed-off-by: Patrick Rudolph <patrick.rudolph@9elements.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32068
Reviewed-by: Felix Held <felix-coreboot@felixheld.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

0 files changed, 0 insertions, 0 deletions