arm: mach-msm: revert to original bus speed value

Gets rid of "Setting AXI min rate failed (-22)"
No clue why UINT_MAX works though, and 192000000 doesn't, as <3.0 kernels have the exact same configuration and doesn't have any Setting AXI min rate failed spam..

https://github.com/Evervolv/android_kernel_htc_msm7x30-3.0/commit/56c9ddf1eb10bd73137349d7461b01a14fc732b0