clk: ti: dra7-atl-clock: Remove ti_clk_add_alias call

ti_clk_register() calls it already so the driver should not create
duplicated alias.

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Link: https://lkml.kernel.org/r/20191002083436.10194-1-peter.ujfalusi@ti.com


Signed-off-by: Stephen Boyd <sboyd@kernel.org>