msm_serial_hs: Add IPC Logging

This patch enables IPC Logging in the high speed UART driver.
The logs are available under sysfs. Log level can be changed by
changing the mask provided in /sys/module.

This patch prints UART Registers while
1)Port Open
2)Port Configuration
3)Rx/Tx Flow
4)Handling ISR and
Prints Tx/Rx Data and Count

Change-Id: I7540f2c4c981271a72cf5a1ffe313ceb53a60867
Signed-off-by: Naveen Kaje <nkaje@codeaurora.org>