drm/msm/adreno: Remove dead code

This BUG_ON will never be reached, and there is a comment 20 above
explaining why.
Signed-off-by: Konrad Dybcio <konrad.dybcio@somainline.org>
Reviewed-by: Akhil P Oommen <quic_akhilpo@quicinc.com>
Patchwork: https://patchwork.freedesktop.org/patch/487586/
Link: https://lore.kernel.org/r/20220528160353.157870-1-konrad.dybcio@somainline.orgSigned-off-by: Rob Clark <robdclark@chromium.org>

drivers/gpu/drm/msm/adreno/a6xx_gmu.c

@@ -1549,8 +1549,6 @@ int a6xx_gmu_init(struct a6xx_gpu *a6xx_gpu, struct device_node *node)
 		if (ret)
 			goto err_memory;
 	} else {
-		BUG_ON(adreno_is_a660_family(adreno_gpu));
-
 		/* HFI v1, has sptprac */
 		gmu->legacy = true;