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lpc_driver_data stores the MMIO port base for EC mapped memory. cros_ec_lpc_readmem uses this port base instead of hardcoding EC_LPC_ADDR_MEMMAP. Signed-off-by: Dustin L. Howett <dustin@howett.net> Reviewed-by: Thomas Weißschuh <linux@weissschuh.net> Tested-by: Thomas Weißschuh <linux@weissschuh.net> Tested-by: Mario Limonciello <superm1@gmail.com> Link: https://lore.kernel.org/r/20240403004713.130365-2-dustin@howett.net Signed-off-by: Tzung-Bi Shih <tzungbi@kernel.org>