msm: smd_debug: Remove the hardcoded entry from debugfs

The int_stats debugfs node output shows both configured and hardcoded
interrupts configurations. with the DT/platform/legacy split change, the
"hardcoded" interrupt configuration is no longer used.

Remove the hardcoded interrupts configuration from the debugfs output.

Change-Id: I99af904d97f0a13c57ad2fcfa1e1598cfa3563cc
Signed-off-by: Arun Kumar Neelakantam <aneela@codeaurora.org>