[PATCH] drm/amdgpu/dc: Really fix DCN3.1 Makefile for PPC64

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Also copy over the part that makes old gcc handling cross-platform.

Fixes: df7a1658f257 ("drm/amdgpu/dc: fix DCN3.1 Makefile for PPC64")
Fixes: 926d6972efb6 ("drm/amd/display: Add DCN3.1 blocks to the DC Makefile")
Signed-off-by: Michal Suchanek <msuchanek@xxxxxxx>
---
The fact that the old gcc handling triggers on gcc 10 and 11 is another
story I don't want to delve into.
---
 drivers/gpu/drm/amd/display/dc/dcn31/Makefile | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/amd/display/dc/dcn31/Makefile b/drivers/gpu/drm/amd/display/dc/dcn31/Makefile
index 5dcdc5a858fe..4bab97acb155 100644
--- a/drivers/gpu/drm/amd/display/dc/dcn31/Makefile
+++ b/drivers/gpu/drm/amd/display/dc/dcn31/Makefile
@@ -28,6 +28,7 @@ endif
 CFLAGS_$(AMDDALPATH)/dc/dcn31/dcn31_resource.o += -mhard-float
 endif
 
+ifdef CONFIG_X86
 ifdef IS_OLD_GCC
 # Stack alignment mismatch, proceed with caution.
 # GCC < 7.1 cannot compile code using `double` and -mpreferred-stack-boundary=3
@@ -36,6 +37,7 @@ CFLAGS_$(AMDDALPATH)/dc/dcn31/dcn31_resource.o += -mpreferred-stack-boundary=4
 else
 CFLAGS_$(AMDDALPATH)/dc/dcn31/dcn31_resource.o += -msse2
 endif
+endif
 
 AMD_DAL_DCN31 = $(addprefix $(AMDDALPATH)/dc/dcn31/,$(DCN31))
 
-- 
2.26.2

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