simplelink_lpf3: drop the local cmsis copy, use cmsis_6 registers

Looks like the cc23x0r5 hal came with a full copy of cmsis 5. Upstream
moved to cmsis 6, drop this copy and fix up few other files to use the
new register names.

Signed-off-by: Fabio Baltieri <[email protected]>

Author: fabiobaltieri

simplelink_lpf3/source/ti/devices/cc23x0r5/cmsis/cc23x0r5.h

@@ -47,6 +47,6 @@ typedef enum IRQn
 #define __VTOR_PRESENT         0x0001U /* VTOR present */
 #define __NVIC_PRIO_BITS       0x0002U /* 2 NVIC priority bits */
 
-#include "core/core_cm0plus.h"
+#include <core_cm0plus.h>
 
 #endif // #ifndef __CC23X0R5_H__