drivers/rtc/rtc-rs5c372.c: convert struct i2c_msg initialization to C99 format

Convert the struct i2c_msg initialization to C99 format.  This makes
maintaining and editing the code simpler.  Also helps once other fields
like transferred are added in future.  while at it also fix a checkpatch
warn WARNING: sizeof rs5c->buf should be sizeof(rs5c->buf)

Signed-off-by: Shubhrajyoti D <shubhrajyoti@ti.com>
Reviewed-by: Felipe Balbi <balbi@ti.com>
Cc: Alessandro Zummo <a.zummo@towertech.it>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

drivers/rtc/rtc-rs5c372.c

@@ -104,7 +104,12 @@ static int rs5c_get_regs(struct rs5c372 *rs5c)
 {
 	struct i2c_client	*client = rs5c->client;
 	struct i2c_msg		msgs[] = {
-		{ client->addr, I2C_M_RD, sizeof rs5c->buf, rs5c->buf },
+		{
+			.addr = client->addr,
+			.flags = I2C_M_RD,
+			.len = sizeof(rs5c->buf),
+			.buf = rs5c->buf
+		},
 	};
 
 	/* This implements the third reading method from the datasheet, using