drm/amd/display: Remove else after return in 'dm_crtc_get_scanoutpos()'

Conform to Linux kernel coding style.

Reported by checkpatch:

WARNING: else is not generally useful after a break or return

Expressions under 'else' branch in function 'dm_crtc_get_scanoutpos' are
executed whenever the expression in 'if' is False. Otherwise, return
from function occurs. Therefore, there is no need in 'else', and it has
been removed.

Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Cc: Aurabindo Pillai <aurabindo.pillai@amd.com>
Signed-off-by: Srinivasan Shanmugam <srinivasan.shanmugam@amd.com>
Reviewed-by: Christian König <christian.koenig@amd.com>
Reviewed-by: Rodrigo Siqueira <Rodrigo.Siqueira@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c

@@ -264,13 +264,14 @@ static int dm_crtc_get_scanoutpos(struct amdgpu_device *adev, int crtc,
 				  u32 *vbl, u32 *position)
 {
 	u32 v_blank_start, v_blank_end, h_position, v_position;
+	struct amdgpu_crtc *acrtc = NULL;
 
 	if ((crtc < 0) || (crtc >= adev->mode_info.num_crtc))
 		return -EINVAL;
-	else {
-		struct amdgpu_crtc *acrtc = adev->mode_info.crtcs[crtc];
 
-		if (acrtc->dm_irq_params.stream ==  NULL) {
+	acrtc = adev->mode_info.crtcs[crtc];
+
+	if (!acrtc->dm_irq_params.stream) {
 		DRM_ERROR("dc_stream_state is NULL for crtc '%d'!\n",
 			  crtc);
 		return 0;
@@ -288,7 +289,6 @@ static int dm_crtc_get_scanoutpos(struct amdgpu_device *adev, int crtc,
 
 	*position = v_position | (h_position << 16);
 	*vbl = v_blank_start | (v_blank_end << 16);
-	}
 
 	return 0;
 }