drm/amd/display: Typo for return check value.

[Why]
Typo for return check value.

[How]
Correct one should be "return enable ? true : false;"
Signed-off-by: Yongqiang Sun <yongqiang.sun@amd.com>
Reviewed-by: Tony Cheng <Tony.Cheng@amd.com>
Acked-by: Bhawanpreet Lakha <Bhawanpreet.Lakha@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/display/dc/dcn10/dcn10_hubbub.c

@@ -100,7 +100,7 @@ bool hububu1_is_allow_self_refresh_enabled(struct hubbub *hubbub)
 	REG_GET(DCHUBBUB_ARB_DRAM_STATE_CNTL,
 			DCHUBBUB_ARB_ALLOW_SELF_REFRESH_FORCE_ENABLE, &enable);
 
-	return true ? false : enable;
+	return enable ? true : false;
 }