drm/amdgpu: implement IRQ_STATE_ENABLE for SDMA v4.4.2

SDMA_CNTL is not set in some cases, driver configures it by itself.

v2: simplify code
Signed-off-by: Tao Zhou <tao.zhou1@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/sdma_v4_4_2.c

@@ -1602,19 +1602,9 @@ static int sdma_v4_4_2_set_ecc_irq_state(struct amdgpu_device *adev,
 	u32 sdma_cntl;
 
 	sdma_cntl = RREG32_SDMA(type, regSDMA_CNTL);
-	switch (state) {
-	case AMDGPU_IRQ_STATE_DISABLE:
-		sdma_cntl = REG_SET_FIELD(sdma_cntl, SDMA_CNTL,
-					  DRAM_ECC_INT_ENABLE, 0);
-		WREG32_SDMA(type, regSDMA_CNTL, sdma_cntl);
-		break;
-	/* sdma ecc interrupt is enabled by default
-	 * driver doesn't need to do anything to
-	 * enable the interrupt */
-	case AMDGPU_IRQ_STATE_ENABLE:
-	default:
-		break;
-	}
+	sdma_cntl = REG_SET_FIELD(sdma_cntl, SDMA_CNTL, DRAM_ECC_INT_ENABLE,
+					state == AMDGPU_IRQ_STATE_ENABLE ? 1 : 0);
+	WREG32_SDMA(type, regSDMA_CNTL, sdma_cntl);
 
 	return 0;
 }