drm/stm: checkpatch strict minor updates

Minor fixes detected with "scripts/checkpatch.pl --strict"
Signed-off-by: Philippe Cornu <philippe.cornu@st.com>
Reviewed-by: Gustavo Padovan <gustavo.padovan@collabora.com>
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1509013473-18365-1-git-send-email-philippe.cornu@st.com

drivers/gpu/drm/stm/dw_mipi_dsi-stm.c

@@ -129,7 +129,7 @@ static int dsi_pll_get_params(int clkin_khz, int clkout_khz,
 	int fvco_min, fvco_max, delta, best_delta; /* all in khz */
 
 	/* Early checks preventing division by 0 & odd results */
-	if ((clkin_khz <= 0) || (clkout_khz <= 0))
+	if (clkin_khz <= 0 || clkout_khz <= 0)
 		return -EINVAL;
 
 	fvco_min = LANE_MIN_KBPS * 2 * ODF_MAX;
@@ -155,7 +155,7 @@ static int dsi_pll_get_params(int clkin_khz, int clkout_khz,
 		for (o = ODF_MIN; o <= ODF_MAX; o *= 2) {
 			n = DIV_ROUND_CLOSEST(i * o * clkout_khz, clkin_khz);
 			/* Check ndiv according to vco range */
-			if ((n < n_min) || (n > n_max))
+			if (n < n_min || n > n_max)
 				continue;
 			/* Check if new delta is better & saves parameters */
 			delta = dsi_pll_get_clkout_khz(clkin_khz, i, n, o) -

drivers/gpu/drm/stm/ltdc.c

@@ -556,7 +556,7 @@ static int ltdc_plane_atomic_check(struct drm_plane *plane,
 	src_h = state->src_h >> 16;
 
 	/* Reject scaling */
-	if ((src_w != state->crtc_w) || (src_h != state->crtc_h)) {
+	if (src_w != state->crtc_w || src_h != state->crtc_h) {
 		DRM_ERROR("Scaling is not supported");
 		return -EINVAL;
 	}