UART device can be removed/added dynamically based on the requirement. Currently removing UART device using platform_unregister_device(), device is crashing with NULL pointer dereference error for debugfs entry node. Also add probe function as __devinit instead of __init section. Change-Id: I058c9093d79d90eb32fb34835cb4ebb1ef4fa704 Signed-off-by: Mayank Rana <mrana@codeaurora.org>