qcom-sm8250.inc: switch to armv8.2-a+crypto
qcom-sm8250.inc: switch to armv8.2-a+crypto

SM8250 SoC implements ARMv8.2-a with crypto extension, so switch default
tune to armv8-2a-crypto. Other supported extensions are not handled by
OE/Yocto (yet).

Signed-off-by: Dmitry Baryshkov <2dcd7ecf02101ef1dca344c0511f3ffb180907c2@linaro.org>

ndechesne/meta-qcom,ndechesne/meta-qcom,ndechesne/meta-qcom