esoc: Convert the boot fail configurations to IOCTLs

Currently the external modem's boot fail configurations,
boot_fail_action and n_pon_tries, are set via module parameters.
Convert it to an IOCTL so that a registered user-space
application has control over the configurations.

Change-Id: Iaf412b873fa452b99811a50e7ae886cc49cfcf81
Signed-off-by: Raghavendra Rao Ananta <rananta@codeaurora.org>