serial: msm_geni_serial: Do not place msm_geni_console_setup under __init

msm_geni_console_setup() can be potentially called from the driver's
probe via uart_add_one_port(). Since it's placed under __init, the
function would be discarded as soon as the module_init portion of the
driver completes, and when called during probe, it causes an instruction
abort. As a result, move the msm_geni_console_setup() out of __init.

Change-Id: I27ebdcd0832bb49d66e85b250b652cc38f4aa333
Signed-off-by: Akash Asthana <akashast@codeaurora.org>