tests: benchmarks: timing_info: Fixed userspace benchmarks for nrf52
tests: benchmarks: timing_info: Fixed userspace benchmarks for nrf52

In NRF52 we need to write to a capture register to retrieve the current
counter value. This was missing for userspace implementation.

Fixes: GH-9676

Signed-off-by: Adithya Baglody <06b44f6fa9a97a2b955c2d2cd070279967447860@intel.com>

punitvara/zephyr,galak/zephyr,kraj/zephyr,punitvara/zephyr,GiulianoFranchetto/zephyr,explora26/zephyr,explora26/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,zephyrproject-rtos/zephyr,galak/zephyr,Vudentz/zephyr,GiulianoFranchetto/zephyr,GiulianoFranchetto/zephyr,explora26/zephyr,finikorg/zephyr,punitvara/zephyr,ldts/zephyr,Vudentz/zephyr,finikorg/zephyr,zephyrproject-rtos/zephyr,nashif/zephyr,ldts/zephyr,Vudentz/zephyr,kraj/zephyr,punitvara/zephyr,ldts/zephyr,kraj/zephyr,finikorg/zephyr,GiulianoFranchetto/zephyr,galak/zephyr,ldts/zephyr,zephyrproject-rtos/zephyr,kraj/zephyr,nashif/zephyr,finikorg/zephyr,punitvara/zephyr,explora26/zephyr,ldts/zephyr,finikorg/zephyr,kraj/zephyr,nashif/zephyr,explora26/zephyr,Vudentz/zephyr,nashif/zephyr,GiulianoFranchetto/zephyr,Vudentz/zephyr,zephyrproject-rtos/zephyr,Vudentz/zephyr,nashif/zephyr