Remove the duplicate brcm,bcm7425-sun-top-ctrl compatible string and
replace it with brcm,bcm7435-sun-top-ctrl which was intended.

Fixes: bd0faf08 ("soc: bcm: brcmstb: Match additional compatible strings")
Reported-by: NAndreas Oberritter <obi@saftware.de>
Acked-by: NGregory Fong <gregory.0xf0@gmail.com>
Signed-off-by: NFlorian Fainelli <f.fainelli@gmail.com>