ASoC: wcd9xxx: Fix crash when enable mbhc driver logs
ASoC: wcd9xxx: Fix crash when enable mbhc driver logs

Fix crash by avoiding NULL pointer access when mbhc driver
logs are enabled.

Change-Id: I2c641c868576a86fef4e261b849297f75888a236
Signed-off-by: Phani Kumar Uppalapati <0898c4e5c8d849879fa65e9f23cfa9cb45bd5a93@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