arm64: dts: seattle: Update spi clock properties

arm64: dts: seattle: Update spi clock properties

PL022 binding require two clocks to be defined but AMD seattle platform
does't comply with binding and define only one clock i.e apb_pclk.

Update spi clocks and clocks-names property by adding appropriate clock
reference to make it compliant with bindings.

CC: Tom Lendacky <thomas.lendacky@amd.com>
Signed-off-by: Kuldeep Singh <singh.kuldeep87k@gmail.com>
Signed-off-by: Rob Herring (Arm) <robh@kernel.org>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20241105-dts-spi-fixes-v2-1-623501e5d1ca@kernel.org
Signed-off-by: Arnd Bergmann <arnd@arndb.de>