I've got the same kernel config with different architecture, 4.4.111-x86-SMP and 4.4.111-x86_64 both with amd-ucode compiled in.
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Linux xhost 4.4.111-x86 #3 SMP Wed Jan 17 12:30:27 CET 2018 i686 AMD Phenom(tm) II X2 550 Processor AuthenticAMD GNU/Linux
Linux xhost64 4.4.111-x64 #5 SMP Mon Jan 15 10:47:37 CET 2018 x86_64 AMD Phenom(tm) II X2 550 Processor AuthenticAMD GNU/Linux
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MK_FW firmware/amd-ucode/microcode_amd.bin.gen.S
AS firmware/amd-ucode/microcode_amd.bin.gen.o
MK_FW firmware/amd-ucode/microcode_amd_fam15h.bin.gen.S
AS firmware/amd-ucode/microcode_amd_fam15h.bin.gen.o
MK_FW firmware/amd-ucode/microcode_amd_fam16h.bin.gen.S
AS firmware/amd-ucode/microcode_amd_fam16h.bin.gen.o
LD firmware/built-in.o
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echo 1 > /sys/devices/system/cpu/microcode/reload
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microcode: CPU0: patch_level=0x01000086
microcode: CPU1: patch_level=0x01000086
microcode: CPU0: new patch_level=0x010000db
microcode: CPU1: new patch_level=0x010000db
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microcode: CPU0: patch_level=0x010000db
microcode: CPU1: patch_level=0x010000db