Update Spike to a version with icache support
Update Spike to a version with icache support

DV now requires a version of Spike with two patches for icache support,
use this version.

lowRISC/ibex,AmbiML/ibex,AmbiML/ibex,AmbiML/ibex,lowRISC/ibex,AmbiML/ibex,lowRISC/ibex,lowRISC/ibex