Renamed mx28_register to mx28_register_32 to prepare for mx28_register_8

This patch renames mx28_register to mx28_register_32 in order to
prepare for the introduction of an 8-bit register, mx28_register_8.

Signed-off-by: Robert Delien <robert@delien.nl>
Acked-by: Marek Vasut <marex@denx.de>
Tested-by: Marek Vasut <marex@denx.de>
diff --git a/drivers/gpio/mxs_gpio.c b/drivers/gpio/mxs_gpio.c
index 0365812..38dbc81 100644
--- a/drivers/gpio/mxs_gpio.c
+++ b/drivers/gpio/mxs_gpio.c
@@ -73,8 +73,8 @@
 {
 	uint32_t bank = PAD_BANK(gpio);
 	uint32_t offset = PINCTRL_DIN(bank);
-	struct mx28_register *reg =
-		(struct mx28_register *)(MXS_PINCTRL_BASE + offset);
+	struct mx28_register_32 *reg =
+		(struct mx28_register_32 *)(MXS_PINCTRL_BASE + offset);
 
 	return (readl(&reg->reg) >> PAD_PIN(gpio)) & 1;
 }
@@ -83,8 +83,8 @@
 {
 	uint32_t bank = PAD_BANK(gpio);
 	uint32_t offset = PINCTRL_DOUT(bank);
-	struct mx28_register *reg =
-		(struct mx28_register *)(MXS_PINCTRL_BASE + offset);
+	struct mx28_register_32 *reg =
+		(struct mx28_register_32 *)(MXS_PINCTRL_BASE + offset);
 
 	if (value)
 		writel(1 << PAD_PIN(gpio), &reg->reg_set);
@@ -96,8 +96,8 @@
 {
 	uint32_t bank = PAD_BANK(gpio);
 	uint32_t offset = PINCTRL_DOE(bank);
-	struct mx28_register *reg =
-		(struct mx28_register *)(MXS_PINCTRL_BASE + offset);
+	struct mx28_register_32 *reg =
+		(struct mx28_register_32 *)(MXS_PINCTRL_BASE + offset);
 
 	writel(1 << PAD_PIN(gpio), &reg->reg_clr);
 
@@ -108,8 +108,8 @@
 {
 	uint32_t bank = PAD_BANK(gpio);
 	uint32_t offset = PINCTRL_DOE(bank);
-	struct mx28_register *reg =
-		(struct mx28_register *)(MXS_PINCTRL_BASE + offset);
+	struct mx28_register_32 *reg =
+		(struct mx28_register_32 *)(MXS_PINCTRL_BASE + offset);
 
 	writel(1 << PAD_PIN(gpio), &reg->reg_set);