intel_idle: further intel_idle_init_cstates_icpu() cleanup

JIRA: https://issues.redhat.com/browse/RHEL-11351



commit 1abffbd8
Author: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Date:   Wed Apr 19 17:39:43 2023 +0300

    intel_idle: further intel_idle_init_cstates_icpu() cleanup

    Introduce a temporary 'state' variable for referencing the currently
    processed C-state in the intel_idle_init_cstates_icpu() function.

    This makes code lines shorter and easier to read.

Signed-off-by: Artem Bityutskiy <artem.bityutskiy@linux.intel.com>
Reviewed-by: Zhang Rui <rui.zhang@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

Signed-off-by: David Arcari <darcari@redhat.com>