msm: pil-femto-modem: Report MBA error status via sysfs

Accurately reflect the status of the MBA via sysfs when
specific failures occur to allow user-space to respond
appropriately.

Change-Id: I21dd5f1f88f7c8b938468ccb0a5816c8dd6ec112
Acked-by: Jennifer L. Zenner <jzenner@qti.qualcomm.com>
Signed-off-by: Rohit Vaswani <rvaswani@codeaurora.org>