add do1-do7 di1 procfs

hc

2023-10-12 3124110e504ba82e43686669ed7188bcdbe72744

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SOCFPGA IS1 BOARD
M:    Pavel Machek <pavel@denx.de>
S:    Maintained
F:    board/is1/
F:    include/configs/socfpga_is1.h
F:    configs/socfpga_is1_defconfig