mainboard/google/poppy: use intel common tis_plat_irq_status()

Utilize the intel/common code for tis_plat_irq_status() to remove
dependencies and code duplication on for bringing up a board
requiring tis_plat_irq_status().

Change-Id: I2aaa1d7d3ce171dc1788438ff9990fce533deb6c
Signed-off-by: Aaron Durbin <adurbin@chromium.org>
Reviewed-on: https://review.coreboot.org/19371
Tested-by: build bot (Jenkins)
2 files changed