Currently, of_get_child_count() is called in each iteration of the for loop in
miphy365x_xlate(). This patch stores the return value of of_get_child_count()
in miphy_dev->nphys and call of_get_child_count() once in miphy365x_probe().
Signed-off-by: NAxel Lin <axel.lin@ingics.com>
Signed-off-by: NKishon Vijay Abraham I <kishon@ti.com>