gpio: pca953x: coding style fixes

pca953x_gpio_set_multiple() has some coding style issues that make it
harder to read. Tweak the code a bit.

Signed-off-by: Bartosz Golaszewski <bgolaszewski@baylibre.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>

drivers/gpio/gpio-pca953x.c

@@ -362,25 +362,28 @@ exit:
 }
 
 static void pca953x_gpio_set_multiple(struct gpio_chip *gc,
-		unsigned long *mask, unsigned long *bits)
+				      unsigned long *mask, unsigned long *bits)
 {
 	struct pca953x_chip *chip = gpiochip_get_data(gc);
+	unsigned int bank_mask, bank_val;
+	int bank_shift, bank;
 	u8 reg_val[MAX_BANK];
 	int ret;
-	int bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
-	int bank;
+
+	bank_shift = fls((chip->gpio_chip.ngpio - 1) / BANK_SZ);
 
 	memcpy(reg_val, chip->reg_output, NBANK(chip));
 	mutex_lock(&chip->i2c_lock);
-	for(bank=0; bank<NBANK(chip); bank++) {
-		unsigned bankmask = mask[bank / sizeof(*mask)] >>
-				    ((bank % sizeof(*mask)) * 8);
-		if(bankmask) {
-			unsigned bankval  = bits[bank / sizeof(*bits)] >>
-					    ((bank % sizeof(*bits)) * 8);
-			reg_val[bank] = (reg_val[bank] & ~bankmask) | bankval;
+	for (bank = 0; bank < NBANK(chip); bank++) {
+		bank_mask = mask[bank / sizeof(*mask)] >>
+			   ((bank % sizeof(*mask)) * 8);
+		if (bank_mask) {
+			bank_val = bits[bank / sizeof(*bits)] >>
+				  ((bank % sizeof(*bits)) * 8);
+			reg_val[bank] = (reg_val[bank] & ~bank_mask) | bank_val;
 		}
 	}
+
 	ret = i2c_smbus_write_i2c_block_data(chip->client,
 					     chip->regs->output << bank_shift,
 					     NBANK(chip), reg_val);