[r2.20] CP PR 3022 Adjust gpu archs list format and environment variable (#3150)

Author: pramenku

tensorflow/tools/tf_sig_build_dockerfiles/Dockerfile.rocm.manylinux_2_28

@@ -17,8 +17,9 @@ COPY setup.packages.rocm.el8.sh setup.packages.rocm.el8.sh
 COPY builder.packages.rocm.el8.txt builder.packages.rocm.el8.txt
 RUN /setup.packages.rocm.el8.sh /builder.packages.rocm.el8.txt
 
-ARG GPU_DEVICE_TARGETS="gfx908 gfx90a gfx942 gfx1030 gfx1100 gfx1101 gfx1102 gfx1200 gfx1201"
-ENV GPU_DEVICE_TARGETS=${GPU_DEVICE_TARGETS}
+ARG GPU_DEVICE_TARGETS="gfx908,gfx90a,gfx942,gfx950,gfx1030,gfx1100,gfx1101,gfx1102,gfx1200,gfx1201"
+ARG GPU_DEVICE_TARGETS=${GPU_DEVICE_TARGETS}
+ENV TF_ROCM_AMDGPU_TARGETS=${GPU_DEVICE_TARGETS}
 
 # Install ROCM
 ARG ROCM_VERSION