[PATCH v6 15/29] fpga: dfl: fme: add header sub feature support

From: Kang Luwei The Header Register set is always present for FPGA Management Engine (FME), this patch implements init and uinit function for header sub feature and introduces several read-only sysfs interfaces for the capability and status. Sysfs interfaces: *

[PATCH v6 15/29] fpga: dfl: fme: add header sub feature support

From: Kang Luwei The Header Register set is always present for FPGA Management Engine (FME), this patch implements init and uinit function for header sub feature and introduces several read-only sysfs interfaces for the capability and status. Sysfs interfaces: *