Bluetooth: Mesh: Fix sending Provisioning Failed for PB-GATT
Bluetooth: Mesh: Fix sending Provisioning Failed for PB-GATT

In the case of an unexpected PDU we need to send the right response.
This was already taken care of for PB-ADV, but not for PB-GATT.

Signed-off-by: Johan Hedberg <628991c7b0a19c384f9b99c21ec330ce952bb838@intel.com>

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