In order to reduce CI overhead, this commit restricts the CMSIS-DSP
tests to only run on the following ARM platforms:
* `frdm_k64f`: Cortex-M4 (to be replaced by `qemu_cortex_m4`)
* `sam_e70_xplained`: Cortex-M7
* `mps2_an521`: Cortex-M33
The following platforms should be added to the platform whitelist in
the future when adequate support is available:
* `qemu_cortex_m4`: Replace `frdm_k64f` when available
* `qemu_cortex_r5`: Add when Cortex-R VFP support is available
* `qemu_cortex_a53`: Add when AArch64 VFP support is available
(and other VFP-equipped ARM testing platforms added in the future)
Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
30a5aefb54