soc/intel/apollolake: Add reset code to postcar stage

Also add a test case for that, a config taken from chromiumos with some
references to binaries dropped that aren't in our blobs repo (eg audio
firmware).

Change-Id: I411c0bacefd9345326f26db4909921dddba28237
Signed-off-by: Patrick Georgi <pgeorgi@google.com>
Reviewed-on: https://review.coreboot.org/29223
Reviewed-by: Martin Roth <martinroth@google.com>
Reviewed-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/soc/intel/apollolake/Makefile.inc

@@ -72,6 +72,8 @@ postcar-y += memmap.c
 postcar-y += mmap_boot.c
 postcar-y += spi.c
 postcar-y += i2c.c
+postcar-$(CONFIG_RESET_ON_INVALID_RAMSTAGE_CACHE) += heci.c
+postcar-$(CONFIG_RESET_ON_INVALID_RAMSTAGE_CACHE) += reset.c
 postcar-$(CONFIG_UART_DEBUG) += uart.c
 
 postcar-$(CONFIG_FSP_CAR) += exit_car_fsp.S