Add Global Timer support to fix High Resolution Timer functionality.

This patch was submitted by Yoshihisa Ozawa <ozawa@lineo.co.jp> in
ticket #52306.
Fix FAST_READ for QSPI nor flash support.

This patch was submitted by Roshni Shah <roshni.shah@timesys.com>
for ticket #52067
Add defconfig for Vybrid Tower

This is the same defconfig that Timesys Factory uses.