mfd: intel_soc_pmic: Constify struct regmap_config

The regmap_config struct may be const because it is not modified by the
driver and regmap_init() accepts pointer to const.

Signed-off-by: Krzysztof Kozlowski <[e-mail]>
Signed-off-by: Lee Jones <[e-mail]>

drivers/mfd/intel_soc_pmic_core.h

···
 	unsigned long irq_flags;
 	struct mfd_cell *cell_dev;
 	int n_cell_devs;
-	struct regmap_config *regmap_config;
+	const struct regmap_config *regmap_config;
 	struct regmap_irq_chip *irq_chip;
 };
 

drivers/mfd/intel_soc_pmic_crc.c

···
 	},
 };
 
-static struct regmap_config crystal_cove_regmap_config = {
+static const struct regmap_config crystal_cove_regmap_config = {
 	.reg_bits = 8,
 	.val_bits = 8,