drm/amd/display: Add guards around MAX/MIN

MAX/MIN macros maybe defined already, hence add a guard around them to
prevent errors that complain about redefinition like:

drivers/gpu/drm/amd/amdgpu/../dal-dev/modules/hdcp/hdcp_ddc.c:31: error: "MIN" redefined [-Werror]
   31 | #define MIN(a, b) ((a) < (b) ? (a) : (b))
      |
In file included from ./include/linux/kernel.h:28,
                 from ./include/linux/cpumask.h:11,
                 from ./include/linux/smp.h:13,
                 from ./include/linux/lockdep.h:14,
                 from ./include/linux/spinlock.h:63,
                 from ./include/linux/mmzone.h:8,
                 from ./include/linux/gfp.h:7,
                 from ./include/linux/slab.h:16,
                 from drivers/gpu/drm/amd/amdgpu/../display/dc/os_types.h:37,
                 from drivers/gpu/drm/amd/amdgpu/../display/modules/inc/mod_hdcp.h:29,
                 from drivers/gpu/drm/amd/amdgpu/../display/modules/hdcp/hdcp.h:29,
                 from drivers/gpu/drm/amd/amdgpu/../display/modules/hdcp/hdcp_ddc.c:29:
./include/linux/minmax.h:329: note: this is the location of the previous definition
  329 | #define MIN(a,b) __cmp(min,a,b)
      |
cc1: all warnings being treated as errors

Reviewed-by: Sun peng Li <sunpeng.li@amd.com>
Signed-off-by: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Roman Li <roman.li@amd.com>
Tested-by: Daniel Wheeler <daniel.wheeler@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

0 files changed, 0 insertions, 0 deletions