Make an exception for MR0_AUDIO_BLOB in loadHwModule_l

Without this exception samsung JB stock audio HAL crashes

get_master_mute and set_master_mute are not present in mr0
Signed-off-by: Curtis Menard <curtis.menard@gmail.com>

Change-Id: I65802fe7d399090e50ec46e2414051da7b30bdfc