drivers/gpio_keys: Remove redundant is_wakeup_source flag

"is_wakeup_source" flag is used to indicate if the concerned device can
trigger a wakeup. This flag is redundant with the "wake" GPE event
definition. So remove the redundant flag and use the "wake" GPE event to
mark the wakeup source.

BUG=None
BRANCH=None
TEST=Boot to ChromeOS. Ensure that the device is marked as wakeup-source
in SSDT if wake GPE is configured. Ensure that the system can suspend
and the device acts as a wakeup source

Change-Id: I99237323639df1cb72e3a81bcfed869900a2eefa
Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com>
Reviewed-on: https://review.coreboot.org/c/31258
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Furquan Shaikh <furquan@google.com>

0 files changed, 0 insertions, 0 deletions