Fixed mtvec bug
Created by: Silabs-ArjanB
Fixed mtvec; mode was not updated in the non-user section of the CSR file; due to typo the vectored address was shifted by one bit position. (Both issues were masked by tb/core/interrupt_test as it used mtvec set to 0 (so that the shift remained unnoticed; this I locally checked but did not push) and because vectored mode was not used (fixed that in the assembly).
Signed-off-by: Arjan Bink Arjan.Bink@silabs.com