misc: led: Add PCA9551 LED driver

This patch adds a driver for the PCA9551 LED controller.

Originated-by: Timo Herbrecher <t.herbrecher@gateware.de>
Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Tom Rini <trini@konsulko.com>
Cc: Fabio Estevam <festevam@gmail.com>
Reviewed-by: Fabio Estevam <fabio.estevam@freescale.com>
diff --git a/drivers/misc/Makefile b/drivers/misc/Makefile
index 25630c3..120babc 100644
--- a/drivers/misc/Makefile
+++ b/drivers/misc/Makefile
@@ -31,3 +31,4 @@
 obj-$(CONFIG_TWL4030_LED) += twl4030_led.o
 obj-$(CONFIG_FSL_IFC) += fsl_ifc.o
 obj-$(CONFIG_FSL_SEC_MON) += fsl_sec_mon.o
+obj-$(CONFIG_PCA9551_LED) += pca9551_led.o