boards: arm: beagle_bcf: Add capacitor tuning

See TI application note SWRA640G section 6.4. "Tuning the HF
Oscillator".

Signed-off-by: Jason Kridner <jkridner@beagleboard.org>

boards/arm/beagle_bcf/beagleconnect_freedom_defconfig

@@ -20,3 +20,5 @@ CONFIG_CC13X2_CC26X2_BOOTLOADER_BACKDOOR_PIN=15
 # Enable MPU and hardware stack protection
 CONFIG_ARM_MPU=y
 CONFIG_HW_STACK_PROTECTION=y
+# Adjust for oscillator capacitors
+CONFIG_CC13X2_CC26X2_XOSC_CAPARRAY_DELTA=0x02