arm: dra7: add DESHDCP clock

Add a new Linux clock for DRA7 based SoCs to control DESHDCP clock.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
Acked-by: Tero Kristo <t-kristo@ti.com>

diff --cc arch/arm/boot/dts/dra7.dtsi
Simple merge

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

diff --cc arch/arm/mach-omap2/omap_hwmod_7xx_data.c
Simple merge

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