android: freedreno: move a2xx disasm out of gallium

android: freedreno: move a2xx disasm out of gallium

Fixes the following building errors:

clang: error: no such file or directory: 'external/mesa/src/gallium/drivers/freedreno/a2xx/disasm-a2xx.c'
clang: error: no input files

FAILED: out/target/product/x86_64/obj/SHARED_LIBRARIES/gallium_dri_intermediates/LINKED/gallium_dri.so
ld.lld: error: undefined symbol: disasm_a2xx
>>> referenced by ir2_assemble.c:546 (external/mesa/src/gallium/drivers/freedreno/a2xx/ir2_assemble.c:546)
>>>               ir2_assemble.o:(assemble) in archive out/target/product/x86_64/obj/STATIC_LIBRARIES/libmesa_pipe_freedreno_intermediates/libmesa_pipe_freedreno.a
clang-9: error: linker command failed with exit code 1 (use -v to see invocation)

Fixes: f39afda1a7a ("freedreno: move a2xx disasm out of gallium")
Signed-off-by: Mauro Rossi <issor.oruam@gmail.com>
Acked-by: Rob Clark <robdclark@gmail.com>
Acked-by: Eric Engestrom <eric@engestrom.ch>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/6151>