hw/arm/armsse: Give SSE-300 its own Property array

SSE-300 currently shares the SSE-200 Property array. This is
bad principally because the default values of the CPU0_FPU
and CPU0_DSP properties disable the FPU and DSP on the CPU.
That is correct for the SSE-200 but not the SSE-300.
Give the SSE-300 its own Property array with the correct
SSE-300 specific settings:
 * SSE-300 has only one CPU, so no CPU1* properties
 * SSE-300 CPU has FPU and DSP

Buglink: https://bugs.launchpad.net/qemu/+bug/1923861


Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210415182353.8173-1-peter.maydell@linaro.org