CONFIG_PUV3_PWM is not available for thedefaultarchitecture x86.
Result is shown for architecture unicore32

CONFIG_PUV3_PWM (not configurable)

modulename: pwm.ko

configname: CONFIG_PUV3_PWM

Linux Kernel Configuration
└─>PUV3_PWM
In linux kernel since version 2.6.39 (release Date: 2011-05-18)  
Enable support for NB0916 PWM controllers

source code:
arch/unicore32/kernel/pwm.c