Update system call entry mechanism (#898)

Earlier the System Call entry from an unprivileged task
looked like:

1. SVC for entering system call.
2. System call implementation.
3. SVC for exiting system call.

Now, the system call entry needs to make only one SVC
call and everything else is handled internally.

This PR also makes the following changes:

1. Update the Access Control List (ACL) mechanism to
    grant access to all the kernel objects before the
    scheduler is started.
2. Add one struct param for system calls with 5 parameters.
    This removes the need for special handling for system
    calls with 5 parameters.
3. Remove raise privilege SVC when MPU wrapper v2 is used.
4. Add additional run time parameter checks to MPU wrappers
    for xTaskGenericNotify and xQueueTakeMutexRecursive APIs.

portable/GCC/ARM_CM23/non_secure/portmacrocommon.h

@@ -322,14 +322,12 @@ extern void vClearInterruptMask( uint32_t ulMask ) /* __attribute__(( naked )) P
 /**
  * @brief SVC numbers.
  */
-#define portSVC_ALLOCATE_SECURE_CONTEXT    0
-#define portSVC_FREE_SECURE_CONTEXT        1
-#define portSVC_START_SCHEDULER            2
-#define portSVC_RAISE_PRIVILEGE            3
-#define portSVC_SYSTEM_CALL_ENTER          4   /* System calls with upto 4 parameters. */
-#define portSVC_SYSTEM_CALL_ENTER_1        5   /* System calls with 5 parameters. */
-#define portSVC_SYSTEM_CALL_EXIT           6
-#define portSVC_YIELD                      7
+#define portSVC_ALLOCATE_SECURE_CONTEXT    100
+#define portSVC_FREE_SECURE_CONTEXT        101
+#define portSVC_START_SCHEDULER            102
+#define portSVC_RAISE_PRIVILEGE            103
+#define portSVC_SYSTEM_CALL_EXIT           104
+#define portSVC_YIELD                      105
 /*-----------------------------------------------------------*/
 
 /**