CONFIG_BF518_PWM_SYNC_PF15 is not available for thedefaultarchitecture x86.
Result is shown for architecture blackfin
default or selected kernelversion does not have config value CONFIG_BF518_PWM_SYNC_PF15.
Result is shown for kernelversion 6.7-rc3

PF15

configname: CONFIG_BF518_PWM_SYNC_PF15

PWM Sync Pin
└─>PF15
In linux kernel since version 3.1 (release Date: 2011-10-24)