leds: leds-alix2c - take port address from MSR
This makes the LEDs driver for ALIX2.C boards work with Coreboot by looking up the port address in the MSR rather than hard-coding it. The BIOS scan also needed some tweaks as the string in Coreboot differs from the one in the legacy BIOS. Successfully tested with both the legacy tinyBIOS as well as Coreboot v3. Signed-off-by: NDaniel Mack <daniel@caiaq.de> Signed-off-by: NRichard Purdie <rpurdie@linux.intel.com>
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