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The DFI unit can be used to measure DRAM utilization using perf. Add the
node to the device tree.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Link: https://lore.kernel.org/r/20231018061714.3553817-26-s.hauer@pengutronix.de

Signed-off-by: Heiko Stuebner <heiko@sntech.de>