arm64: dts: r8a7795: Remove unit-addresses and regs from integrated caches

The Cortex-A57/A53 cache controllers are integrated controllers, and
thus the device nodes representing them should not have unit-addresses
or reg properties.

Fixes: 6f7bf82c ("arm64: dts: r8a7795: Fix W=1 dtc warnings")
Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Simon Horman <horms+renesas@verge.net.au>