msm: smd: Clean up some ifdefs for multi-target support

Collapse two identical sets of interrupt definitions
guarded by two ifdefs into a single set of definitions
which is the same for several targets.

Change-Id: I7e9fc735522c69964d84b645adc93c10f65ae3ec
Signed-off-by: Stepan Moskovchenko <stepanm@codeaurora.org>