dtoc: Update test_src_scan.py for new tegra compatibles

This test was written to match up with the list of compatibles in
drivers/i2c/tegra_i2c.c so adding another one requires the test to be
updated to match.

Fixes: 0d2105ae ("arm: tegra: Update some DT compatibles")
Signed-off-by: Tom Rini <trini@konsulko.com>