power: add driver for the TPS65219 PMIC

The TPS65219 I2S PMIC features 3 Buck converters and 4 linear regulators,
2 GPOs, 1 GPIO, and 3 multi-function-pin.

This adds the PMIC driver, loading the regulator sub-nodes.

Signed-off-by: Neil Armstrong <narmstrong@baylibre.com>
diff --git a/drivers/power/pmic/Makefile b/drivers/power/pmic/Makefile
index 584d6e0..f73b326 100644
--- a/drivers/power/pmic/Makefile
+++ b/drivers/power/pmic/Makefile
@@ -43,3 +43,4 @@
 obj-$(CONFIG_POWER_HI6553) += pmic_hi6553.o
 obj-$(CONFIG_POWER_MC34VR500) += pmic_mc34vr500.o
 obj-$(CONFIG_PMIC_TPS65941) += tps65941.o
+obj-$(CONFIG_PMIC_TPS65219) += tps65219.o