Remove the deprecated flag CFG_PM_DEBUG

Signed-off-by: Hashem Tatari <hashem.tatari@exset.com>
Acked-by: Jerome Forissier <jerome.forissier@linaro.org>
Reviewed-by: Etienne Carriere <etienne.carriere@linaro.org>
diff --git a/qemu_v8.mk b/qemu_v8.mk
index 6910c72..303d0bd 100644
--- a/qemu_v8.mk
+++ b/qemu_v8.mk
@@ -133,7 +133,7 @@
 # OP-TEE
 ################################################################################
 OPTEE_OS_COMMON_FLAGS += PLATFORM=vexpress-qemu_armv8a CFG_ARM64_core=y \
-			 DEBUG=$(DEBUG) CFG_PM_DEBUG=0
+			 DEBUG=$(DEBUG)
 optee-os: optee-os-common
 
 OPTEE_OS_CLEAN_COMMON_FLAGS += PLATFORM=vexpress-qemu_armv8a