mfd: davinci_voicecodec: 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/davinci_voicecodec.c

···
 
 #include <linux/mfd/davinci_voicecodec.h>
 
-static struct regmap_config davinci_vc_regmap = {
+static const struct regmap_config davinci_vc_regmap = {
 	.reg_bits = 32,
 	.val_bits = 32,
 };