drm/amd/display/amdgpu_dm/amdgpu_dm: Functions must directly follow their headers

Fixes the following W=1 kernel build warning(s):

 drivers/gpu/drm/amd/amdgpu/../display/amdgpu_dm/amdgpu_dm.c:608: warning: Function parameter or member 'interrupt_params' not described in 'dm_dcn_vertical_interrupt0_high_irq'

Cc: Harry Wentland <harry.wentland@amd.com>
Cc: Leo Li <sunpeng.li@amd.com>
Cc: Alex Deucher <alexander.deucher@amd.com>
Cc: "Christian König" <christian.koenig@amd.com>
Cc: David Airlie <airlied@linux.ie>
Cc: Daniel Vetter <daniel@ffwll.ch>
Cc: amd-gfx@lists.freedesktop.org
Cc: dri-devel@lists.freedesktop.org
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -601,6 +601,7 @@ static void dm_crtc_high_irq(void *interrupt_params)
 }
 
 #if defined(CONFIG_DRM_AMD_DC_DCN)
+#if defined(CONFIG_DRM_AMD_SECURE_DISPLAY)
 /**
  * dm_dcn_vertical_interrupt0_high_irq() - Handles OTG Vertical interrupt0 for
  * DCN generation ASICs
@@ -608,7 +609,6 @@ static void dm_crtc_high_irq(void *interrupt_params)
  *
  * Used to set crc window/read out crc value at vertical line 0 position
  */
-#if defined(CONFIG_DRM_AMD_SECURE_DISPLAY)
 static void dm_dcn_vertical_interrupt0_high_irq(void *interrupt_params)
 {
 	struct common_irq_params *irq_params = interrupt_params;