drm/amdgpu: drop flags check for CHIP_IP_DISCOVERY

Support for IP based discovery is in place now so this
check is no longer required.
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -1907,11 +1907,6 @@ static int amdgpu_pci_probe(struct pci_dev *pdev,
 			return -ENODEV;
 	}
 
-	if (flags == CHIP_IP_DISCOVERY) {
-		DRM_INFO("Unsupported asic.  Remove me when IP discovery init is in place.\n");
-		return -ENODEV;
-	}
-
 	if (amdgpu_virtual_display ||
 	    amdgpu_device_asic_has_dc_support(flags & AMD_ASIC_MASK))
 		supports_atomic = true;