Revert "acpuclock-8960: Lower VDD dig & mem voltages"

Some SD cards can't handle lower voltages as well as others.
Stay on the safe side & revert to CAF

This reverts commit 7caf796707ff4d6e85c6842b3295818d1d859457.
TEST2: Bump max bw & bw factors

TEST FOR: Slight underrun seen on occasion.

Change-Id: I6af9cad2a7865c02ad55648aa19d4bcfd61bcded
Signed-off-by: Luis Cruz <ljc2491@gmail.com>