Add ARM aarch64 support to dispatcher

[wd13384]

Signed-off-by: William Dean wd13384@gmail.com

Tested on Apple M1 with oneVPL provided docker files (except Ubuntu 19.10, which does not appear to support aarch64 in docker hub)

[mav-intel]

Thanks for the update! After some internal discussions we think the better direction is to remove the specific architectures completely and just check what we care about directly - the bit-ness.

So rather than checking for i386, perhaps something like?

#if INTPTR_MAX == INT32_MAX
    #define LIBMFXSW "libvplswref32.so.1"
    #define LIBMFXHW "libmfxhw32.so.1"
#elif INTPTR_MAX == INT64_MAX
    #define LIBMFXSW "libvplswref64.so.1"
    #define LIBMFXHW "libmfxhw64.so.1"
#else	
    #error Unsupported architecture	 
#endif

[StefanBruens]

@wd13384 - can you please rebase this?
@mav-intel - is there anything in here which is still unresolved and needs changing?

This not only fixes aarch64, but also RISC-V, and all the legacy archs out there.

[StefanBruens]

There is also another x86_64 check here, which is AFAICS completely unnecessary:
https://github.com/oneapi-src/oneVPL/blob/15b79165c30fc4a7bf6efdf261a39b128b63b896/tools/legacy/sample_common/src/sample_utils.cpp#L45-L49

[jonrecker]

PR was out of sync with the HEAD so changes were pulled into the following commit: 6182082