drm/amdgpu: remove ip dump reg_count variable

reg_count is not used and the register count is
directly derived from the array size and hence
removed.
Signed-off-by: Sunil Khatri <sunil.khatri@amd.com>
Acked-by: Christian König <christian.koenig@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_gfx.h

@@ -436,7 +436,6 @@ struct amdgpu_gfx {
 
 	/* IP reg dump */
 	uint32_t			*ip_dump;
-	uint32_t			reg_count;
 };
 
 struct amdgpu_gfx_ras_reg_entry {

drivers/gpu/drm/amd/amdgpu/gfx_v10_0.c

@@ -4592,10 +4592,8 @@ static void gfx_v10_0_alloc_dump_mem(struct amdgpu_device *adev)
 	if (ptr == NULL) {
 		DRM_ERROR("Failed to allocate memory for IP Dump\n");
 		adev->gfx.ip_dump = NULL;
-		adev->gfx.reg_count = 0;
 	} else {
 		adev->gfx.ip_dump = ptr;
-		adev->gfx.reg_count = reg_count;
 	}
 }