mfd: Mark const init data with __initconst instead of __initdata for ab5500

As long as there is no other non-const variable marked __initdata in the
same compilation unit it doesn't hurt. If there were one however
compilation would fail with

	error: $variablename causes a section type conflict

because a section containing const variables is marked read only and so
cannot contain non-const variables.
Signed-off-by: NUwe Kleine-König <u.kleine-koenig@pengutronix.de>
Signed-off-by: NSamuel Ortiz <sameo@linux.intel.com>

drivers/mfd/ab5500-core.c

@@ -1291,7 +1291,7 @@ struct ab_family_id {
 	char	*name;
 };
 
-static const struct ab_family_id ids[] __initdata = {
+static const struct ab_family_id ids[] __initconst = {
 	/* AB5500 */
 	{
 		.id = AB5500_1_0,