drm/amdgpu/gfx: refine fw hdr check fuction

The return value of function amdgpu_ucode_hdr_version
doesn't make sense, so change it to return true when
fw header version is match with passed in parameters.
Signed-off-by: Wenhui Sheng <Wenhui.Sheng@amd.com>
Signed-off-by: Likun Gao <Likun.Gao@amd.com>
Reviewed-by: Hawking Zhang <Hawking.Zhang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

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

@@ -428,8 +428,8 @@ bool amdgpu_ucode_hdr_version(union amdgpu_firmware_header *hdr,
 {
 	if ((hdr->common.header_version_major == hdr_major) &&
 		(hdr->common.header_version_minor == hdr_minor))
-		return false;
 		return true;
+	return false;
 }
 
 enum amdgpu_firmware_load_type