ARM: ux500: Add vendor prefix to tps61052 node

The tps61052 device node doesn't have a vendor prefix
in its compatible string, fix it by adding one.

Signed-off-by: Javier Martinez Canillas <javier@dowhile0.org>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Tony Lindgren <tony@atomide.com>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Lee Jones <lee.jones@linaro.org>