power: bq27xxx_battery: Add support for additional bq27xxx family devices

Add support for additional devices and register equivalent family devices
including the bq27010, bq27210, bq27500, bq27510, bq27520, bq27530,
bq27531, bq27541, bq27542, bq27546, bq27545, bq27441, bq27421, and the
bq27641.

To facilitate this process the register mapings have been moved to tables
and other small cleanups have been made.
Signed-off-by: NAndrew F. Davis <afd@ti.com>
Signed-off-by: NSebastian Reichel <sre@kernel.org>

include/linux/power/bq27xxx_battery.h

@@ -12,7 +12,15 @@
  *	register to be read. The return value should either be the content of
  *	the passed register or an error value.
  */
-enum bq27xxx_chip { BQ27000 = 1, BQ27500, BQ27425, BQ27742, BQ27510 };
+enum bq27xxx_chip {
+	BQ27000 = 1, /* bq27000, bq27200 */
+	BQ27010, /* bq27010, bq27210 */
+	BQ27500, /* bq27500, bq27510, bq27520 */
+	BQ27530, /* bq27530, bq27531 */
+	BQ27541, /* bq27541, bq27542, bq27546, bq27742 */
+	BQ27545, /* bq27545 */
+	BQ27421, /* bq27421, bq27425, bq27441, bq27621 */
+};
 
 struct bq27xxx_platform_data {
 	const char *name;