ARM: dts: dra7xx-clocks: Correct name for atl clkin3 clock

To allign the name with the other atl clock names:
atlclkin3_ck -> atl_clkin3_ck

Signed-off-by: Peter Ujfalusi <peter.ujfalusi@ti.com>
Signed-off-by: Tero Kristo <t-kristo@ti.com>

diff --cc arch/arm/boot/dts/dra7xx-clocks.dtsi
Simple merge

diff --cc drivers/clk/ti/clk-7xx.c
Simple merge