soc/cavium: Integrate BDK files into coreboot

* Make it compile.
* Fix whitespace errors.
* Fix printf formats.
* Add missing headers includes
* Guard headers with ifdefs

Compile DRAM init code in romstage.
Compile QLM, PCIe, RNG, PHY, GPIO, MDIO init code in ramstage.

Change-Id: I0a93219a14bfb6ebe41103a825d5032b11e7f2c6
Signed-off-by: David Hendricks <dhendricks@fb.com>
Reviewed-on: https://review.coreboot.org/25089
Reviewed-by: Philipp Deppenwiese <zaolin.daisuki@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/vendorcode/Makefile.inc

@@ -2,3 +2,4 @@ subdirs-y += amd
 subdirs-y += google
 subdirs-y += intel
 subdirs-y += siemens
+subdirs-y += cavium