ACPICA: Debugger: Remove some unecessary NULL checks

ACPICA commit 36fcc1b98def3fb6e20cf5e877ffc3c1592d0140

Local strupr function already checks for NULL pointers.

Original linux patch submitted by:
Markus Elfring <elfring@users.sourceforge.net>

Link: https://github.com/acpica/acpica/commit/36fcc1b9Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Signed-off-by: Bob Moore <robert.moore@intel.com>
Signed-off-by: Lv Zheng <lv.zheng@intel.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>

drivers/acpi/acpica/dbcmds.c

@@ -1131,13 +1131,8 @@ void acpi_db_trace(char *enable_arg, char *method_arg, char *once_arg)
 	u32 debug_layer = 0;
 	u32 flags = 0;
 
-	if (enable_arg) {
 	acpi_ut_strupr(enable_arg);
-	}
-
-	if (once_arg) {
 	acpi_ut_strupr(once_arg);
-	}
 
 	if (method_arg) {
 		if (acpi_db_trace_method_name) {

drivers/acpi/acpica/dbinput.c

@@ -625,9 +625,7 @@ static u32 acpi_db_get_line(char *input_buffer)
 
 	/* Uppercase the actual command */
 
-	if (acpi_gbl_db_args[0]) {
 	acpi_ut_strupr(acpi_gbl_db_args[0]);
-	}
 
 	count = i;
 	if (count) {