drm/xe: Rename few xe_args.h macros

drm/xe: Rename few xe_args.h macros

To minimize the risk of future name collisions, rename macros to
always include the ARG or ARGS tag:

  DROP_FIRST to DROP_FIRST_ARG
  PICK_FIRST to FIRST_ARG
  PICK_LAST to LAST_ARG

Suggested-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Michal Wajdeczko <michal.wajdeczko@intel.com>
Cc: Lucas De Marchi <lucas.demarchi@intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> #v2
Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240508171000.1864-1-michal.wajdeczko@intel.com