fsp_broadwell_de: Switch to common SPI controller driver
The common SPI controller driver in src/southbridge/intel/common does
match the SPI controller included in the PCH of Broadwell-DE SoC. Switch
to the usage of this driver and delete the dedicated one for the FSP
based Broadwell-DE implementation.
TEST: Boot mc_bdx1 with SPI driver active in romstage
Change-Id: I4fe8057ea1981e350659a5caa9912fb758110115
Signed-off-by: Werner Zeh <werner.zeh@siemens.com>
Reviewed-on: https://review.coreboot.org/29633
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Reviewed-by: Arthur Heymans <arthur@aheymans.xyz>