linux-imx

mfd: tps65090: Add compatible string for charger subnode

This patch adds the of_compatible value for the tps65090 charger
subnode used when loading the driver to find its properties
and of_node.

Signed-off-by: Rhyland Klein <rklein@nvidia.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>