arm64: dts: r8a7795: correct whitespace of companion property

Fixes: 4dad6dcd ("arm64: dts: renesas: r8a7795: add usb2.0 host ch3 device nodes")
Fixes: 1c422b4c ("arm64: dts: renesas: r8a7795: Add usb companion property in EHCI")
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>