hammerhead: remove MACH_TYPE_CATALYST definition.

Catalyst uses another memory controller (Platinum)
that significantly differs from Hammerhead.
Low-level board constants don't match too.

devices/memctrl/hammerhead.h

@@ -38,13 +38,10 @@ along with this program.  If not, see <https://www.gnu.org/licenses/>.
 #include <memory>
 
 namespace Hammerhead {
-
-#define RISC_MACHINE       0x3
-#define MACH_TYPE_TNT      0x1
-#define EXTENDED_ID_TNT    0x1 // examine some other registers to get full ID
-#define MACH_TYPE_CATALYST 0x0
-#define HH_CPU_ID_TNT      ((RISC_MACHINE << 4) | (EXTENDED_ID_TNT << 3) | MACH_TYPE_TNT)
-#define HH_CPU_ID_CATALYST ((RISC_MACHINE << 4) | 0                      | MACH_TYPE_CATALYST)
+    #define RISC_MACHINE  0x3
+    #define MACH_TYPE_TNT 0x1
+    #define EXTENDED_ID   0x1 // examine some other registers to get full ID
+    #define HH_CPU_ID_TNT ((RISC_MACHINE << 4) | (EXTENDED_ID << 3) | MACH_TYPE_TNT)
 
     // constants for the MBID field of the MOTHERBOARD_ID register
     enum {