cc3200: Change PRCM_PeriphRegs_t fields to unsigned char.

This helps saving ~300 bytes. Thanks to dpgeorge.

cc3200/hal/prcm.h

@@ -59,8 +59,8 @@ extern "C"
 typedef struct _PRCM_PeripheralRegs_
 {
 
-unsigned long ulClkReg;
-unsigned long ulRstReg;
+unsigned char ulClkReg;
+unsigned char ulRstReg;
 
 }PRCM_PeriphRegs_t;