ARM: dts: aspeed: Specify correct generic compatible for CVIC

ARM: dts: aspeed: Specify correct generic compatible for CVIC

The ASPEED CVIC binding documents `aspeed,cvic` as the required generic
compatible, but the devicetrees contained `aspeed-cvic`. Update the
devictrees to use `aspeed,cvic` as documented and as required by
the driver implementation. Presumably the bug was the result of some
incoherent thoughts while removing the SoC name at the time of
writing.

Link: https://lore.kernel.org/r/20240802-dt-warnings-bmc-dts-cleanups-v1-2-1cb1378e5fcd@codeconstruct.com.au
Signed-off-by: Andrew Jeffery <andrew@codeconstruct.com.au>
Signed-off-by: Joel Stanley <joel@jms.id.au>