on i386:

ld: drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.o: in function `mtk_vcodec_dec_clock_on':
mtk_vcodec_dec_pm.c:(.text+0xff): undefined reference to `mtk_smi_larb_get'
ld: drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_pm.o: in function `mtk_vcodec_dec_clock_off':
mtk_vcodec_dec_pm.c:(.text+0x180): undefined reference to `mtk_smi_larb_put'
ld: drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_pm.o: in function `mtk_vcodec_enc_clock_on':
mtk_vcodec_enc_pm.c:(.text+0xd0): undefined reference to `mtk_smi_larb_get'
ld: mtk_vcodec_enc_pm.c:(.text+0xf3): undefined reference to `mtk_smi_larb_get'
ld: mtk_vcodec_enc_pm.c:(.text+0x114): undefined reference to `mtk_smi_larb_put'
ld: drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_pm.o: in function `mtk_vcodec_enc_clock_off':
mtk_vcodec_enc_pm.c:(.text+0x181): undefined reference to `mtk_smi_larb_put'
ld: mtk_vcodec_enc_pm.c:(.text+0x189): undefined reference to `mtk_smi_larb_put'

Full randconfig file is attached.

-- 
~Randy
Reported-by: Randy Dunlap <redacted>