tests: Add basic lifecycle test for mediatek_i2c_spi

This unit test does not require any additional mocks because init
and shutdown of i2c infra was covered in realtek programmer lifecycle.
Default mocking of i2c is sufficient to run a basic lifecycle.

To run the test, config option for the programmer needs to be
enabled explicitly, since by default this programmer is disabled.

BUG=b:238816884
TEST=meson configure -Dconfig_mediatek_i2c_spi=true
ninja test

Change-Id: I98a12067d165c90013d33ffc45d20dab5c364c83
Signed-off-by: Anastasia Klimchuk <aklm@chromium.org>
Reviewed-on: https://review.coreboot.org/c/flashrom/+/66261
Reviewed-by: Edward O'Callaghan <quasisec@chromium.org>
Reviewed-by: Felix Singer <felixsinger@posteo.net>
Reviewed-by: Thomas Heijligen <src@posteo.de>
Reviewed-by: Alexander Goncharov <chat@joursoir.net>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

tests/meson.build

@@ -26,6 +26,7 @@ srcs = [
   'linux_mtd.c',
   'linux_spi.c',
   'parade_lspcon.c',
+  'mediatek_i2c_spi.c',
   'realtek_mst_i2c_spi.c',
   'layout.c',
   'chip.c',