This reverts commit 66ee379d.

The feature flag introduced by Commit 66ee379d ("mfd: cros_ec: Add
SCP Core-1 as a new CrOS EC MCU") was not first added in the source EC
code base[1]. This can lead to the possible misinterpration of an EC's
supported feature set, as well as causes issues with all future feature
flag updates.

[1] https://source.chromium.org/chromium/chromiumos/platform/ec/+/main:include/ec_commands.hSigned-off-by: Prashant Malani <pmalani@chromium.org>
Acked-by: Lee Jones <lee@kernel.org>
Reviewed-by: Benson Leung <bleung@chromium.org>
Acked-by: Heikki Krogerus <heikki.krogerus@linux.intel.com>
Link: https://lore.kernel.org/r/20221228004648.793339-2-pmalani@chromium.org