soc: qcom: qsee_ipc_irq_bridge: Rearrange parsing property

It is possible to receive an interrupt from QSEE before the character
device is initialized. Do not register for interrupts and subsystem
restart notifications until the character device is initialized.

Change-Id: Ife207f817fd4bd5783c430f16de2a6d56edb9f06
Signed-off-by: Chris Lew <clew@codeaurora.org>