spmi: Fix compilation error when debugfs is disabled
spmi: Fix compilation error when debugfs is disabled

Code does not compile with debugfs disabled. Fix this.

Change-Id: I11fa09401f29e9f2fb65d19668cae455253f6355
Signed-off-by: Olav Haugan <fbf4ddd114d5f0aa83cb721b7dacab8a264ccf22@codeaurora.org>

TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas,TeamVee-Kanas/android_kernel_samsung_kanas