mb/{kontron/968lcd-m,roda/rk886ex}: select non-SPI

These mainboard don't feature a SPI flash. The SPI init code
will timeout on probing for a SPI flash which takes a lot of time.
Not including all SPI drivers also lightens the uncompressed ramstage
of about 17K or 7K compressed.

Change-Id: Icc7bf62d56fc2ef38854402e658830b8d59c737f
Signed-off-by: Arthur Heymans <arthur@aheymans.xyz>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/36870
Reviewed-by: Nico Huber <nico.h@gmx.de>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

src/mainboard/kontron/986lcd-m/Kconfig

@@ -16,6 +16,7 @@ config BOARD_SPECIFIC_OPTIONS
 	select BOARD_ROMSIZE_KB_1024
 	select INTEL_INT15
 	select OVERRIDE_CLOCK_DISABLE
+	select BOOT_DEVICE_NOT_SPI_FLASH
 
 config MAINBOARD_DIR
 	string

src/mainboard/roda/rk886ex/Kconfig

@@ -18,6 +18,7 @@ config BOARD_SPECIFIC_OPTIONS
 	select HAVE_ACPI_RESUME
 	select BOARD_ROMSIZE_KB_1024
 	select INTEL_INT15
+	select BOOT_DEVICE_NOT_SPI_FLASH
 
 config MAINBOARD_DIR
 	string