samples: bluetooth: Fix errata 117 check

There is a typo in the nrf5340 errata 117 logic, where it checked
for a nRF52-series device instead of a nRF53-series device.
This caused a hard-fault if the function ran successfully
on a nRF52-series device.

Fix is to use the same implementation as done in sample
../peripheral/radio_test

File and function:
radio_test.c::errata_117()

Signed-off-by: Håkon Alseth <[email protected]>

Author: Rallare

samples/bluetooth/direct_test_mode/src/dtm.c

@@ -1592,7 +1592,7 @@ static void errata_172_handle(bool enable)
 
 static void errata_117_handle(bool enable)
 {
-	if (!nrf52_errata_117()) {
+	if (!nrf53_errata_117()) {
 		return;
 	}