mfd: twl: Endian fixups in i2c write and read wrappers

Use a local variable to ensure correct endian types for
intermediate results.

Identified by sparse when building the IIO driver.

Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>

include/linux/mfd/twl.h

@@ -181,14 +181,18 @@ static inline int twl_i2c_read_u8(u8 mod_no, u8 *val, u8 reg) {
 }
 
 static inline int twl_i2c_write_u16(u8 mod_no, u16 val, u8 reg) {
-	val = cpu_to_le16(val);
-	return twl_i2c_write(mod_no, (u8*) &val, reg, 2);
+	__le16 value;
+
+	value = cpu_to_le16(val);
+	return twl_i2c_write(mod_no, (u8 *) &value, reg, 2);
 }
 
 static inline int twl_i2c_read_u16(u8 mod_no, u16 *val, u8 reg) {
 	int ret;
-	ret = twl_i2c_read(mod_no, (u8*) val, reg, 2);
-	*val = le16_to_cpu(*val);
+	__le16 value;
+
+	ret = twl_i2c_read(mod_no, (u8 *) &value, reg, 2);
+	*val = le16_to_cpu(value);
 	return ret;
 }