radeonsi: fix stupid bug added in commit 07838603b9a69c05911edbcd351bfce5ad9b5a2c

Signed-off-by: Christian König <deathsimple@vodafone.de>
Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/src/gallium/drivers/radeonsi/si_state_draw.c b/src/gallium/drivers/radeonsi/si_state_draw.c
index 5f8e211..75df4e8 100644
--- a/src/gallium/drivers/radeonsi/si_state_draw.c
+++ b/src/gallium/drivers/radeonsi/si_state_draw.c
@@ -170,13 +170,14 @@
 	si_pm4_set_reg(pm4, R_0286E0_SPI_BARYC_CNTL, spi_baryc_cntl);
 	spi_ps_input_ena = shader->spi_ps_input_ena;
 	/* we need to enable at least one of them, otherwise we hang the GPU */
-	if (!spi_ps_input_ena & (C_0286CC_PERSP_SAMPLE_ENA |
-				 C_0286CC_PERSP_CENTROID_ENA |
-				 C_0286CC_PERSP_PULL_MODEL_ENA |
-				 C_0286CC_LINEAR_SAMPLE_ENA |
-				 C_0286CC_LINEAR_CENTER_ENA |
-				 C_0286CC_LINEAR_CENTROID_ENA |
-				 C_0286CC_LINE_STIPPLE_TEX_ENA)) {
+	if (!G_0286CC_PERSP_SAMPLE_ENA(spi_ps_input_ena) &&
+	    !G_0286CC_PERSP_CENTROID_ENA(spi_ps_input_ena) &&
+	    !G_0286CC_PERSP_PULL_MODEL_ENA(spi_ps_input_ena) &&
+	    !G_0286CC_LINEAR_SAMPLE_ENA(spi_ps_input_ena) &&
+	    !G_0286CC_LINEAR_CENTER_ENA(spi_ps_input_ena) &&
+	    !G_0286CC_LINEAR_CENTROID_ENA(spi_ps_input_ena) &&
+	    !G_0286CC_LINE_STIPPLE_TEX_ENA(spi_ps_input_ena)) {
+
 		spi_ps_input_ena |= S_0286CC_PERSP_SAMPLE_ENA(1);
 	}
 	si_pm4_set_reg(pm4, R_0286CC_SPI_PS_INPUT_ENA, spi_ps_input_ena);