drm/msm/a6xx: Use "else if" in GPU speedbin rev matching

The GPU can only be one at a time. Turn a series of ifs into if +
elseifs to save some CPU cycles.
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Akhil P Oommen <quic_akhilpo@quicinc.com>
Signed-off-by: Konrad Dybcio <konrad.dybcio@linaro.org>
Patchwork: https://patchwork.freedesktop.org/patch/542770/Signed-off-by: Rob Clark <robdclark@chromium.org>

drivers/gpu/drm/msm/adreno/a6xx_gpu.c

@@ -2276,16 +2276,16 @@ static u32 fuse_to_supp_hw(struct device *dev, struct adreno_rev rev, u32 fuse)
 	if (adreno_cmp_rev(ADRENO_REV(6, 1, 8, ANY_ID), rev))
 		val = a618_get_speed_bin(fuse);
 
-	if (adreno_cmp_rev(ADRENO_REV(6, 1, 9, ANY_ID), rev))
+	else if (adreno_cmp_rev(ADRENO_REV(6, 1, 9, ANY_ID), rev))
 		val = a619_get_speed_bin(fuse);
 
-	if (adreno_cmp_rev(ADRENO_REV(6, 3, 5, ANY_ID), rev))
+	else if (adreno_cmp_rev(ADRENO_REV(6, 3, 5, ANY_ID), rev))
 		val = adreno_7c3_get_speed_bin(fuse);
 
-	if (adreno_cmp_rev(ADRENO_REV(6, 4, 0, ANY_ID), rev))
+	else if (adreno_cmp_rev(ADRENO_REV(6, 4, 0, ANY_ID), rev))
 		val = a640_get_speed_bin(fuse);
 
-	if (adreno_cmp_rev(ADRENO_REV(6, 5, 0, ANY_ID), rev))
+	else if (adreno_cmp_rev(ADRENO_REV(6, 5, 0, ANY_ID), rev))
 		val = a650_get_speed_bin(fuse);
 
 	if (val == UINT_MAX) {