Make it available on arrch64

[liubeihefei]

Hi, i encounter a problem when i use Schurvins based on this algorithm on my Orangepi 5.And i found the possiable reason is that the algorithm is used on Odroid which usually has defined the variable ARM_ARCHITECTURE.However when others want apply this execellent algorithm on other devices like the Orangepi 5 i use, the second option which appoints the instruciton set on x86 will make error.So i make a little change in file SvoSetup.cmake to promise the application on arrch64.