radv/gfx10: fix PS exports for SPI_SHADER_32_AR

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>
diff --git a/src/amd/vulkan/radv_nir_to_llvm.c b/src/amd/vulkan/radv_nir_to_llvm.c
index bf5571f..84ab586 100644
--- a/src/amd/vulkan/radv_nir_to_llvm.c
+++ b/src/amd/vulkan/radv_nir_to_llvm.c
@@ -2596,9 +2596,15 @@
 			break;
 
 		case V_028714_SPI_SHADER_32_AR:
-			args->enabled_channels = 0x9;
-			args->out[0] = values[0];
-			args->out[3] = values[3];
+			if (ctx->ac.chip_class >= GFX10) {
+				args->enabled_channels = 0x3;
+				args->out[0] = values[0];
+				args->out[1] = values[3];
+			} else {
+				args->enabled_channels = 0x9;
+				args->out[0] = values[0];
+				args->out[3] = values[3];
+			}
 			break;
 
 		case V_028714_SPI_SHADER_FP16_ABGR: