msm/dt: 8974: Add BLSP2 based UART1 resources

This change adds UART1 resources and configuration to use
BLSP2 based UART1.

Also update document of its usage with device tree.

Change-Id: Ifed0c2ce3a862f2df56c1a3b7dad3019b1a28cd5
Signed-off-by: Mayank Rana <mrana@codeaurora.org>
Signed-off-by: Saket Saurabh <ssaurabh@codeaurora.org>
4 files changed