coding guidelines: comply with MISRA Rule 20.9

- avoid to use undefined macros in #if expressions

Signed-off-by: Hess Nathan <nhess@baumer.com>

include/zephyr/linker/common-ram.ld

@@ -43,7 +43,7 @@
                 __device_states_end = .;
         } GROUP_DATA_LINK_IN(RAMABLE_REGION, ROMABLE_REGION)
 
-#if CONFIG_PM_DEVICE
+#ifdef CONFIG_PM_DEVICE
 	ITERABLE_SECTION_RAM(pm_device_slots, Z_LINK_ITERABLE_SUBALIGN)
 #endif
 

include/zephyr/logging/log_msg.h

@@ -72,7 +72,7 @@ struct log_msg_hdr {
 /* Attempting to keep best alignment. When address is 64 bit and timestamp 32
  * swap the order to have 16 byte header instead of 24 byte.
  */
-#if (INTPTR_MAX > INT32_MAX) && !CONFIG_LOG_TIMESTAMP_64BIT
+#if (INTPTR_MAX > INT32_MAX) && !defined(CONFIG_LOG_TIMESTAMP_64BIT)
 	log_timestamp_t timestamp;
 	const void *source;
 #else

include/zephyr/sys/__assert.h

@@ -12,15 +12,21 @@
 
 #ifdef CONFIG_ASSERT
 #ifndef __ASSERT_ON
+#ifdef CONFIG_ASSERT_LEVEL
 #define __ASSERT_ON CONFIG_ASSERT_LEVEL
 #endif
 #endif
+#endif
 
 #ifdef CONFIG_FORCE_NO_ASSERT
 #undef __ASSERT_ON
 #define __ASSERT_ON 0
 #endif
 
+#ifndef __ASSERT_ON
+#define __ASSERT_ON 0
+#endif
+
 #ifdef __cplusplus
 extern "C" {
 #endif