phy: ti-pipe3: remove set but unused variable

ti_pipe3_power_on() sets variable 'ret' but never uses it, so remove it.

drivers/phy/ti/phy-ti-pipe3.c:340:6: warning: variable ‘ret’ set but not
used [-Wunused-but-set-variable]

Link: https://lore.kernel.org/r/20200629145010.122675-4-vkoul@kernel.org


Signed-off-by: Vinod Koul <vkoul@kernel.org>