[media] saa7164: Improvements for I2C handling"

This reverts commit ad90b6b0f10566d4a5546e27fe455ce3b5e6b6c7.

This patch breaks I2C communication towards Si2168. After reverting and
applying the other patch in this series the I2C communication is
correct.

Signed-off-by: Olli Salonen <[e-mail]>
Reviewed-by: Antti Palosaari <[e-mail]>
Signed-off-by: Mauro Carvalho Chehab <[e-mail]>

drivers/media/pci/saa7164/saa7164-api.c

···
 	 *       08... register address
 	 */
 	memset(buf, 0, sizeof(buf));
-	if (reg)
-		memcpy((buf + 2 * sizeof(u32) + 0), reg, reglen);
+	memcpy((buf + 2 * sizeof(u32) + 0), reg, reglen);
 	*((u32 *)(buf + 0 * sizeof(u32))) = reglen;
 	*((u32 *)(buf + 1 * sizeof(u32))) = datalen;
 
···
 	 *       04-07 dest bytes to write
 	 *       08... register address
 	 */
-	if (datalen == 1) {
-		/* Workaround for issues with i2c components
-		 * that issue writes with no data. IE: SI2168/2157
-		 * Increase reglen by 1, strobe out an additional byte,
-		 * ignored by SI2168/2157.
-		 */
-		datalen++;
-	}
 	*((u32 *)(buf + 0 * sizeof(u32))) = reglen;
 	*((u32 *)(buf + 1 * sizeof(u32))) = datalen - reglen;
 	memcpy((buf + 2 * sizeof(u32)), data, datalen);