drm/i915/bios: Parse HOBL parameter
HOBL means hours of battery life, it is a power-saving feature were supported motherboards can use a special voltage swing table that uses less power. So here parsing the VBT to check if this feature is supported. BSpec: 20150 Reviewed-by: Anusha Srivatsa <anusha.srivatsa@intel.com> Signed-off-by: José Roberto de Souza <jose.souza@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20200708205512.21625-3-jose.souza@intel.com
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