msm_serial_hs_lite: Add support for up to 4 Mbps baud rate
msm_serial_hs_lite: Add support for up to 4 Mbps baud rate

UART Hardware can support Max baud rate of 4 Mbps. Hence add
support for up to 4 Mbps baud rate. With this change UART
hardware can be used with max 4 Mbps baud rate in PIO Mode.

Change-Id: Ifecc20e29916a460038320d59c462cd6556e2903
Signed-off-by: Mayank Rana <c0579117a9883a806771b33bfb04b3440dbd27bf@codeaurora.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas