freedreno: drop ARRAY_SIZE macro

freedreno: drop ARRAY_SIZE macro

Since now ARRAY_SIZE has been added to util/macros.h.  Fixes a bunch of:

  freedreno_util.h:79:0: warning: "ARRAY_SIZE" redefined
   #define ARRAY_SIZE(arr) (sizeof(arr) / sizeof((arr)[0]))
   ^
  In file included from ../../../../src/gallium/include/pipe/p_compiler.h:36:0,
                   from ../../../../src/gallium/include/pipe/p_context.h:31,
                   from freedreno_context.h:32,
                   from freedreno_context.c:29:
  ../../../../src/util/macros.h:29:0: note: this is the location of the previous definition
   #  define ARRAY_SIZE(x) (sizeof(x) / sizeof(*(x)))
   ^

Signed-off-by: Rob Clark <robclark@freedesktop.org>