LEDS: add BlinkM RGB LED driver, documentation and update MAINTAINERS

Add driver for BlinkM device to drivers/leds/.
Add entry to MAINTAINERS file.
Add documentation in Documentation/leds/.

A BlinkM is a RGB LED controlled through I2C.

This driver implements an interface to the LED framework
and another sysfs group to access the internal options
of the BlinkM.

rev6: Use module_i2c_driver().
rev5: Removed own workqueue in favor of events wq.
rev4: Fixed comments by Bryan Wu.
rev3: Fixed issues found by Jonathan Neuschäfer.

([email protected]: remove 2 trailing whitespace)

Signed-off-by: Jan-Simon Möller <[email protected]>
Signed-off-by: Bryan Wu <[email protected]>
diff --git a/MAINTAINERS b/MAINTAINERS
index fe643e7..4d8811a 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1518,6 +1518,11 @@
 S:	Supported
 F:	drivers/i2c/busses/i2c-bfin-twi.c
 
+BLINKM RGB LED DRIVER
+M:	Jan-Simon Moeller <[email protected]>
+S:	Maintained
+F:	drivers/leds/leds-blinkm.c
+
 BLOCK LAYER
 M:	Jens Axboe <[email protected]>
 T:	git git://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git