power/alderlake: Cleanup code to use common GPIO name
power/alderlake: Cleanup code to use common GPIO name

SEQ_EC_ALL_SYS_PG is commonly named as PG_EC_ALL_SYS_PWRGD.
Removing it to reduce the redundant declarations needed in
zephyr.

BUG=b:200975143
BRANCH=main
TEST=make buildall -j; boot up brya

Change-Id: Ie266460dfe9c61dbbb97e1d1b714824929c5a098
Signed-off-by: Divya Sasidharan <dba62b20a5027527f6399518550d13252dee26fc@intel.com>
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3180807
Reviewed-by: Vijay Hiremath <006c712879a3af08bfdb5c2b8491a8b2d5fd73cd@intel.com>
Reviewed-by: caveh jalali <08e24a66aefda7a55ca7d73f8903e0fb16eec763@chromium.org>
Reviewed-by: Keith Short <f6d578f97033c25f1206cb57d52f358974c82954@chromium.org>
Commit-Queue: Keith Short <f6d578f97033c25f1206cb57d52f358974c82954@chromium.org>

coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec,coreboot/chrome-ec