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There are 4 MDIO > controllers embedded in Aspeed AST2600 SOC and share one reset control > register SCU50[3]. To work with old DT blobs which don't have the reset > property, devm_reset_control_get_optional_shared is used in this change. > > Signed-off-by: Dylan Hung > Reviewed-by: Philipp Zabel > Reviewed-by: Andrew Lunn Reviewed-by: Andrew Jeffery